Outboard motor only runs on one cylinder

outboard motor only runs on one cylinder Look at the high psi reading on the gauge and let the gauge sit for 5 minutes. Re: I think my outboard was running on one cylinder Okay so heres what happend: I took the carb apart again i put back the old seat which didn't look like there was anything wrong with it and the new needle didn't get stuck and moved smooth once again, set the float height, put the carb back. Waterman of Detroit, U. Found that one with rpm loss had bad connection in harness. This Force 25 hp only weights 92lbs!! It is one of the lightest 25hp outboards ever made. Motor ran fine, then started running a little rough. I have only run it in a test tank at present just to make sure it starts and wouldn't fall to pieces but it started and sounds awesome. 5 to 350 horsepower for more than 75 years, though the company's first motors did not have as much horsepower as some of its current motors. But then, propane is a clean, convenient, and very portable fuel. Do this until you find the right set of twins for getting home on one engine. These single cylinder Mercurys were in production in one form or another since the early-1960's. One part might be responsible, or a number of parts can contribute to the overheating problem. I pulled the plug wire on top and middle cylinder at 1900 rpms and each stalled the motor. Engine is low on power or has a "miss". Hi I just bought a 94 - 130 SWS which was recently serviced and is very clean. Older two cycle outboards, especially low horsepower, can run fine around 60 psi however above 90 psi is optimal. You can run a compression test on a cylinder by inserting a gauge in the spark plug cylinder and turning the engine over several times. Just one example: I had a 1987 Merc 3 cylinder 90hp that ran ok, but was internally noisey to my ear. ADVANTAGE: Either regular or counter rotation modeADVANTAGE can be selected on the same Engine power is transferred to the water more outboard. While almost anything will run some of the smaller outboards (rated for as low as 84 octane), most engines require at least an honest 87 octane, with 89 preferred. This forces ("jacks") the rings outward, scoring the cylinder or, worse, locking up the engine. A damaged or weakened coil produces weak spark as well. EXPLANATION: The timing chain runs in an oil-bath so it never needs lubricating, and is equipped with an automatic hydraulic tensioner so it remains properly That sounds like you’re running on ONE CYLINDER! Well the motor is anyway! Here the deal…those old OMC Motors will run fine on one cylinder. For sale is a 2 Cylinder Universal diesel motor that has only been used in . Okay heres whats going on: 1) did compression test and both cylinders are firing the top was 111 psi and the bottom 110psi. 2. 04-26-2012, 09:20 AM. Polished steel surfaces (crankshaft, bearings, rings, etc. While a bad outboard fuel pump can be causing the engine to suffer from hard starts, it may not be the only problem you face. These motors will have the power of V6 or V8 cylinder blocks behind them generating up to 557 horsepower. I can buy a one-pounder for $3. Cylinder-to-cylinder compression readings that differ more than 10% reveal trouble. a day trying to get my newly aquired RD to run only to find that . Engine stalls frequently. Checking for spark and looking for faults. Does this motor need to come apart? Should I try seafoaming it first? What do you think it is? Mercury/Johnson/Evinrude. It had been sitting for awhile. When your outboard starts right up, keeps running with throttle applied in neutral, but shuts down the moment you come back to idle speed in neutral, the issue is likely to be a sticky or broken AIS (automatic idle speed) valve. You know so without manually grounding it out the motor will just run on forever. If that is the case, no biggie because fuel ( and oil) is still entering the cylinder If a carb was blocked and then cleared it could do MAJOR damage running it that way. PartsVu’s mission is to help provide you with the knowledge, insights, parts, and products to help you to enjoy each and every day you are able to spend on the water. US Patent#1,001,260: Marine propulsion mechanism by Ole Evinrude. Engine fails to run and has no spark (possibly on only one cylinder). Clarke Troller twin cylinder. but when the 3rd kicks in, the dififference is notice … read more Do not run hard in the driveway, idle only on the hose. Engine has only about 50 hrs on it. 3) change my impeller cause it felt like it was over heating. A motor like this running well is only worth $400-$800 so don't go out and buy a bunch of new parts for it before you verify it runs. 0 about 30 minutes. It had a shopping list of items to address. It houses the engine block, cylinder heads, pistons and valves that make the engine run. I have used the inline spark tester, running at both idle and as high a speed as I can get it in a barrel. Regardless, any large motor is one that is so heavy that it has to be either bolted or bracket bolted to the transom. It started fairy quickly but when I put it in the water I could not get over 2,000 RPM, except twice when I got to 4,200. This is a 25 hp Force 3 Cylinder Made By Mercury Marine. The engine is a twin-cylinder, 16 cubic inch gasoline powered. Check the DVA voltage of the Stator, (on 3 and 6 cylinder models read from each red and blue Wire to engine ground; on 4 cylinder models read between the two red wires and between the two blue wires), with everything connected. Pull the starter rope through until all the water has been pumped out of the cylinder. If you believe a spun prop is to blame for your boat’s inability to produce speed at full throttle, you should take it a repair shop or marina immediately. Engine fails to run and has no spark. I'm home now. Bulb pulls straight out of assembly. Even mild overheating can cause serious damage to expensive engine components. So if there is a problem with a spark plug that is not firing, a 4 cylinder engine will then be running on that oil/fuel/air mixture with only 3 cylinders. Home › Forum › Ask A Member › JW Running on one cylinder only This topic has 16 replies, 6 voices, and was last updated 4 months ago by crosbyman . You should probably remove the recoil starter and peek in at each coil under the flywheel though the inspection port in the flywheel and see if either coil is cracked. Seems to be bottom cylinder not firing properly. Carb was rebuilt over the winter. Other 3 cylinders at 115psi. Use a GE No. Engine is hard to start especially after sitting from a run. If the motor dies when a plug boot is pulled then you know the other cylinder was never firing or is very weak. Pull the starter rope through several times. How to Change Outboard Motor Gearbox Oil by Reefari. Making a wire harness and key to mate with motor wires. The motor ran fine last summer, until late in the season when it became hard to start and would run only with the choke open…and poorly then. pump. After running the engine for awhile to get it up to temperature I then checked compression. 5-second run . Evinrude outboard which runs fine some of the time but one cylinder kicks out intermittently. The engine stalls in neutral, at idle, only. Cleaned carbon from all plugs and arranged them in different order and re-tested motor and cylinder 3 is still has no caron, just fuel/oil mixture so it's getting fuel. Disconnect kill Wire AT the Pack. Zero spark at the gap. C. ” Boat Safe. If the compression is too low though, it will not run at all. That meant adding engine oil to the empty crankcase (drained bone dry for shipping) and also making sure there was plenty of lubricant in the lower unit. Sounds like a clogged jet in the carb. In order to really test this theory, you need to “grid out the flywheel”, so you have a timing mark on the flywheel for #2 cylinder…Not real tough, cuz this is just a two cylinder engine, so 180 degrees across the flywheel from number one grid. This outboard motor is a 2-stroke traditional engine that will produce 2. a. More often than I would think, someone comes in that "Just Bought a Boat" and says that the motor dies when you put it into gear when in the water at the la. The motor has about 70psi on each cylinder, and a spark plug tester shows good spark on each one. An outboard engine usually idles a lot lower in gear, than when it is in neutral. That sounds like you’re running on ONE CYLINDER! Well the motor is anyway! Here the deal…those old OMC Motors will run fine on one cylinder. Most Mercury Outboard Stators perform two important functions 1. Clarke Troller single cylinder. Tested the motor and still weak. P. It’s a 350’s power, but with the efficiency of a 300. Take out all of the spark plugs followed by taking compression readings for each cylinder. The symptoms of a bad outboard coil are as follows: 1. Later we’ll discuss how one can maintain an outboard motor to make it last longer. To change light bulb, twist black socket assembly one-eighth turn counter clockwise until it pops out. Along with the four-stroke varieties, these modern outboard engines are cleaner, quieter, and more economical than the old motors. Hard starting. You probably fouled a plug or a plug wire came loose. Low compression on just one cylinder can be a blown head gasket, burnt valve, or a broken ring on that cylinder. I then performed a leakdown test. Like everything that is on a boat engine, the coil inside your outboard is sealed component. ) start to rust after a few years (oiling is only done by running motor). D. As far as I have been able to discover, the first Outboard Motor ever manufactured and actually run was made by Mr. - Finding the sweet spot on Boat motor idle One cylinder may also be missing a spark. Hence, the outdoor motor fails to start. Currently, there are 0 users and 1 guest visiting this topic. Compression is 120 on all 3 cylinders. For high-performance models, use 91 octane. A faulty or failing trigger can cause one or more symptoms. Check for broken or bare wires on the Unit, Stator and Trigger. If you have a two-stroke outboard motor, you must add oil to the fuel to . . Brian: flint99: posted 01-27-2005 02:40 PM ET (US) Do this until you find the right set of twins for getting home on one engine. One of Evinrude's original outboard patents. Essentially, the powerhead is made up of the bare bones of the engine, which include the following components: One cylinder may also be missing a spark. Replacement off all items off ignition system: Breaker Points Assembly 0580148 (2) Condenser 0580321 (2) COIL&LAM AY,W/GROM 0584477 (2) Place a small engine tachometer clip lead around the number one cylinder spark plug. Upon testing I discovered a fried ignition coil and replaced but had the same problem. Conclusions. As the piston travels up and down in the cylinder, the piston rings seal against the cylinder wall so the air/fuel mixture can be compressed at the top of the cylinder on the upstroke. A fouled spark plug, that is a plug covered in oil, carbon or other stuff causes a weak spark. This is a 1960's outboard built in the former Soviet Union. Lehr says the LP2. Start the engine and run it for a while. If the engine is a 4-Cycle model (unmixed fuel) such as a Honda or Onan, the test is performed slightly differently as shown in Figure 2. Torque from the propeller is transferred straight through . drown that cylinder and get the wrong impression. Here we will be looking for conti-nuity from one spark plug clip to the other since there is only one secondary coil which is not connected to the engine block. Any information appreciated. If two cylinders next to each other both have low pressure, a blown head gasket is a likely culprit. A new 40 Hp 1100cc Chinese Vee Twin to go on the back of my old 1976 Pride Explorer 17 speedboat. Essentially, the powerhead is made up of the bare bones of the engine, which include the following components: These motors run remarkably well on one cylinder except they have very little power at the top end. Little d. An incredible engineering piece! A real gas motor is in the lower unit and runs! It's an outstanding replica of the real Clarke Troller. Shows how to drain out your old oil and replace it with new. Tested 0 compression on one cylinder. If and when you get it running and determine it is viable then yes, by all means, replace the water pump impeller and rebuild the carburetor as well as change the gearcase lube and grease all the grease points. Has good compression, runs. Palmer Brothers S-1, 1914, inboard, single cylinder, 2 cycle, gasoline marine engine. In this video I investigate whether the Yamaha 20 HP has a vacuum leak causing it to go lean. The name on the motor translates to Whirlwind or Vortex, it is a two cylinder, 2-stroke, water cooled outboard of 20 horsepower. 5hp. 3hp single-cylinder four-stroke portable outboard, with the 3. , in the summer of 1904. Patent granted August 22, 1911. Closing Thoughts. The spark seems to be the same on both cylinders. Awesome guys. this is another older switch that's off another outboard, but I'll open this one and show you what presuming is actually a working mechanism. 10. Crank Cylinder Assemble (powerhead) is the quickest but not the cheapest, number one in this diagram is a new powerhead assemble, Make sure this is correct model number and make sure to oreder the part number for the 200 hp, 1998 S200TXRW Yamaha Outboard CYLINDER CRANKCASE 1 Diagram and Parts. Meaning, that one winding will produce the electricity that is used for one, two, or three different cylinders! So, if one winding will fail. The Honda four-stroke outboard engine range starts with a 2. They provide voltage to your switchbox or CDM's. Changed coil and cleaned carbs. Yes, an outboard will run for a little while with low compression. Regards. They started out as a 3. but when the 3rd kicks in, the dififference is notice … read more Different motor. A. Compression low on both, but within 10% of each other. This is one of only a very few Palmer S-1 in our . 75 a gallon—and you have to dispose of the empty cylinder (Lehr is working on a refillable one-pounder). It was made in Kuybyshev Novosibirsk Oblast, Russia at the "Factory of Frunse" (named after a Soviet hero) by a company today known as Motorostroitel. Extremely rare! Just one example: I had a 1987 Merc 3 cylinder 90hp that ran ok, but was internally noisey to my ear. Suzuki DF325A. Never restored, fresh water cooled with eccentric driven water pump. 3 but tied the winning Mazdaspeed with its 5. S. This gets the lower unit out of the . One of the cylinders had over 38% blowby. Here are all of the things that you need to know about low compression on an outboard engine, what they mean, and how they affect the running of the engine! This is another sign of possibly a bad coil, or missing spark on one cylinder. A healthy engine should have 100 PSI per cylinder. It is way better than the one-cylinder air-cooled outboards made by Eska and sold as Ted Williams or Eska or Golden jet or dozens of other names into the 1980’s. Suitable for both freshwater and saltwater, this outboard motor by Sea Dog Water Sports will give you more versatility. 5 hp single cylinder motor marked on the rear of the cowling as 45. You need to be able to add only a little fuel, note the result, try a bit more, note the result, and so on. Losing power To H. If you have a dashboard tachometer gauge, have an assistant monitor it for rpm readings. A faulty or failing stator can cause one or more symptoms. Turn each idle-mixture screws in clockwise until they gently seat. It is also one of the more powerful outboards made being that it has 3 cylinders. You can see spark on outside of wire connection on bad cylinder when running, also hear sparking noise. 3. The motor we will be discussing here is a 4. Another sign that your coil is no longer in good condition is when there is no spark produced at all at the gap. Most outboards are controlled by a steering arm at the front of the engine, providing the proper leverage and balance to turn the engine on the swivel; whether it is hydraulic or cable. Then it wouldn't start without starting fluid/fuel sprayed into carbs. Engine ignition requires a spark in the plug gap. Revolutionary: Suzuki Marine 350 power with 300 efficiency Perfectly balancing power with fuel efficiency, this is the world’s first fully capable outboard for large boats that runs on extremely low-octane 91 RON fuel. Johnson 1996 60hp Not rated yet Started the outboard couldn't run only on choke then cleaned the carbs, was very dirty put everything back on and running it and testing the cylinder if … Mid 80's 2 cyl, 2 stroke Johnson 50 HP Not rated yet I have a mid 80’s, 50 HP, 2 Cyl, Johnson I bored it 0. The smallest one-cylinder and two-cylinder engines are marketed as “portable” motors. I do this by spraying LPG over the crank case and then also blocking off the exhaust and doing a pressure test on the crank case. The cylinders can be bored/ or replaced, at a good machine shop. The two to four-cylinder style will be powerful enough to push hulls of up to 17 feet as they will produce 15 to 135 HP. Was the motor running fine just recently or has it been in layup? Could also be running on one cylinder make sure you have spark on both. For any gas-powered motor to run correctly, three things are needed: Fuel; Air; Spark that ignites the air/fuel mixture; If one of these elements isn’t supplied, the engine isn’t going to start. Getting a rebuild I guess. 100 . sea Visitor An outboard gas engine needs air, fuel, spark, compression, and unobstructed exhaust — in the right amounts and at the right time. That number indicates how hot the spark plug is. Some smaller or older outboards may not even have one. If your Tachometer is equipped with an hourmeter, the hourmeter will be energized only while the engine is running. When buying used outboard motors, here are essential things to look for: • Compression. Checked all new spark plugs and the one in cylinder 3 is squeaky clean, no carbon, just fuel with slight blue tint. 6-litre V6 BF250 at the top of the range. Pulled head today and found some scoring on wall and small piece piston missing. 08-24-2005, 05:53 PM. If it’s running on only two cylinders, it’s likely either the top two or the bottom two. Most outboard motors have a box like device over the carburetor air inlets that is usually called an air silencer. Your outboard stator is the "powerhouse" of your outboards ignition system. Spray a lot of WD40 in again and quickly put the spark plug back in and connect the spark plug wire. Diesel outboard I have one! A diesel outboard that is. Mercury Marine, based in Wisconsin, has been making Mercury outboard motors in two- and four-stroke versions ranging from 2. Viewed cylinders through exhaust, no scoring, rings appear bluer on lower cylinder. The spark plugs. Connect the other tachometer lead to a ground source. No missing parts, cracks or welds. Finding a Vacuum Leak in an Outboard Motor. Then turn them counterclockwise 1 1/4 to 1 1/2 . This is a motor that came in on a boat that was new to the current owner. The Engine Doesn’t Start. 040 over, Wiesco pistons, milled the head 0. Extremely rare! one outboard with an optional connector. Very rare! I think only 56 of these and the twin cylinder below were made. 00—which works out to about $12. Avoid those things unless they’re really cheap. If you decide to check the coils, remember that you have to test across the two top plug wires to test that coil, then across the two bottom plug wires to test the other one. It will run on 2 cyl. We hope this article gave you some ideas as to why your outboard motor is not running at full power. 9. Low compression will not cause an engine to not run. The boat’s motor will still operate and function as it should, but the lack of a connection between the propshaft and propeller blades drastically reduces the boat’s top speed. Place a small engine tachometer clip lead around the number one cylinder spark plug. 1. If the psi leaks down to zero, you have a blown head gasket, bad valve or cracked cylinder. The recent big news for this brand’s outboards was the arrival of Honda Marine’s range of revamped V6 engines. Your engine is mounted on a mounting bracket and the engine turns on a swivel, as part of the bracket. This is a twin-cylinder water-cooled 2-stroke motor. To run properly, the coil must remain intact and crack-free. Just put it on my stand and determined there's no spark in top cylinder. set the slow speed needle 1 1/2 turns just like the post The engine will get great economy running on 2cyls because it will BLOW UP. Outboard Motor Tachometer Mercury has released a V-12 outboard marine motor that makes 600 horsepower. Patents. This is the most obvious symptom. In some cases, it may start, yet misfiring can occur, as well as some shaking. Spray a ton of WD40 or the like into the spark plug hole. Re: I think my outboard was running on one cylinder. Sizes of Outboard Motor. Extremely rare! This posting is the result of a year long test and of Yamaha Motor's F6 small outboard motor I personally unpacked this 6-hp small outboard motor from its shipping crate and prepped it. Outboard . This is why you can have a bad stator, but the engine will still run, just very poorly. Overheating problems in an inboard-outboard motor, also called a "stern-drive," happen as a result of component failure somewhere in the cooling system. b. The readings should be typically be above 100 Psi on each one, and within a minimum of 10 PSI, with the ideal been between 2 to 5 from one another. Newer, fuel-injected outboards can have as many as 12 of these filters—two or three primaries and one or more for each fuel injector. 5. They charge your vessel's battery(s). Tilt and Trim. It happens to be among the lightest small outboard motor weighing only 21 pounds. Now run the engine, best done in the dark and look to see if the number two grid shows up when . same cylinder. Triggers are very reliable Triggers can fail for one or more of the following . An open spark path will kill the . I need a rocker arm for the intake valve }}however it still runs on one cylinder if you can believe it. 2) Did a spark test and electricuted my self both times but there is spark. 5 hp until 1985. When I pulled bottom cylinder wire motor still run. US Patent#1,166,523: Outboard motor by Carl Alrik Hult and Oscar Walfrid Hult . Low compression on all cylinders is caused by wear, and can only be fixed by overhauling the engine. All cylinders were between 125-130 psi. The lower the number the hotter the plug, the higher number the cooler the plug. Runs the same with wire off, and my spark tool isn't lighting up 1988 Johnson 88hp. The one with low psi is port motor. I have a mid 1980 70 hp 3 cyl. It may not run efficiently but it will run. Blows water everywhere. Breaks down around 1900 rpms. So, if you fancy a two-stroke direct fuel-injection outboard motor because of its lightweight, go ahead and buy it because they are compliant. Only carburettor-based outboard motors will be banned starting July 1, 2019. On the simplest of outboard engines these are easily replaceable, often installed inline between the fuel inlet and the carburetor. If you examine the coil and find it is cracked or looks melted. but that one's only every five years or 1000 hours. If you’re repowering an existing boat, consider this an opportunity to boost the horsepower to make sure you can plane on one outboard. To do a drop test, fire up the motor, bring it to a fast idle, and with a pair of insulated pliers, pull one spark plug boot at a time. In this case you can see that this one is an 8, and this one here is a 5, so it's a B8 for this one and a BKR5 for the other one. “The number of hours that a marine engine runs is very dependent on the amount and quality of maintenance over the years. The others were around 20%. Superb bronze "make and break" low tension ignition. Runs fine on higher rpms. Outboard Motor Cowl (1) Outboard . you can see here that this switch has a flat on the top part of the casing and on the bottom so I'm just going to put a . Making the engine run very poorly. Cracked or Broken Coil. If you discover you do have low compression, the only solution is to replace the leaking part whether it’s the piston, piston ring, camshaft, head gasket or valves. Last night I was able to get my 4378 zephyr to fire up for the first time. Four stroke/cycle engines produce much higher compression. The main thing to check is the difference between cylinder compression. 6. Cummins running take out, Detroit marine engine, . Stock # FSN 2805 072 4871, Serial #N, Military model - 2A016 III, Manual - TM5-2805-257--14 & 24P. 5 will run for an hour at WOT on a one-pound cylinder, the LP5. Problem fixed: difficulties to start the engine and then running on one cylinder only. 1 cylinder not firing. When running on just one of two outboards, tilt up the non-operable motor. For this reason, they are a popular choice for small boats. In excellent condition. 4. The engine will lose spark on one or all of those cylinders. But, maintenance isn’t the only thing that can keep an outboard running. This Force 25 hp Outboard is a long shaft that is in great freshwater condition. Manufacturers usually divide their product offerings up by the number of cylinders that the engine has. Thanks - Rick doubleu. They can be hand-lifted and usually attach to the boat with simple clamps that can be undone easily. 9 hp in 1964, and were upgraded to 4 hp in 1968 till 1974, then in 1975 4. The top section of an outboard motor, or the outboard powerhead, is composed of various components that make up a combustion engine. It was a two-stroke motor, single cylinder, the drive being transmitted from the crankshaft to the driveshaft by a vertical sprocket, the driveshaft remaining absolutely . Will An Outboard Run With Low Compression. 194 instrument lamp for replacement. Finding a replacement sleeve, new piston, rings, and all associated parts for the whole rebuild, may be the big challenge. outboard motor only runs on one cylinder