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    1998 8hp E8RECR Fouling and runs poorly.

    Compression last checked in March 2021 was 90psi Upper Cylinder, 95 Lower Cylinder. Was running OK but had a Slow Speed Cough which I eliminated in September by backing out the Slow Speed Screw by 1 1/2 turns (seemed like a lot at the time but made engine run better in water tank). In November...
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    Yamaha 3hp 3MSHY (6L5) stalling after Carb Leak Fixed.

    I forgot to include status update. I removed the Carb and disassembled as far as possible. I poked fire wires appropriately, blew out passages, did not see any debris. Reassembled and ran in water tank. The Fuel Leak is back! But this time seems to be coming from higher than the Bowl...
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    Yamaha 3hp 3MSHY (6L5) stalling after Carb Leak Fixed.

    Thanks for the input. I see you are in Scotland, I would like to visit your country when (if) COVID settles down. We have been to England and Ireland on vacation, but not yet to Scotland. Before I retired I used to work with a lot of folks from/in Greenock. They were very enjoyable co-workers.
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    Yamaha 3hp 3MSHY (6L5) stalling after Carb Leak Fixed.

    This explanation makes sense although I didn't see any debris in the bowl. I will do a Carb clean (including blowing out the jets etc) and reassemble/retry. Thanks
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    Yamaha 3hp 3MSHY (6L5) stalling after Carb Leak Fixed.

    I am working on a 3MSHY manufactured 10/99 that had a fuel leak between the Carb Bowl and the Carb Body. Gasket (#40 in exploded diagram) may have been original to the engine, i.e. 21 years old. Gasket felt more like hard plastic than rubber and was severely flattened, not rounded in cross...
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    Minimum compression on 9.9hp 1986.

    Crosbyman, I really don't have a hunch re: whether it is getting too much fuel or too little fuel whenever it bogs down. I bought the motor 5 years or more ago from a young guy who bought it from another guy. IIRC the young guy said that the guy he bought it from said it was converted to 15hp...
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    Minimum compression on 9.9hp 1986.

    I ran on the water yesterday for 30 minutes or so. Motor runs ok to middle RPM'S but above that it bogs down and wants to die unless I back off the throttle. It restarts ok if I do bog it down until it dies. My guess is it needs a full carb rebuild including High Speed jet. Make sense? I...
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    Minimum compression on 9.9hp 1986.

    I remeasured Compression today using 2 Gauges different than I used back in August 2019. Good results: 1 gauge (wrench-tightened into Spark Plug Hole) measured 100 to 105psi. Other gauge (finger tightened, i.e round not hex head)--probably leaking slightly gave slightly lower readings...
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    8hp evinrude rough idle, dies when throttle is applied

    Nwebb, look at LeeRoy's Ramblings website, he explains how to build an excellent adjustable Spark Tester for less than $5. Better than some of the Chinese made junk testers that break easily...
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    Minimum compression on 9.9hp 1986.

    Racer, the engine seems to start and idle OK. for quite a few years I have been borrowing a Compression Tester from AutoZone (at least 2 different stores in 2 different States) when I need to perform Compression Test. I doubt that Autozone gets these Testers calibrated on any regular basis. How...
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    Minimum compression on 9.9hp 1986.

    Starting a winter project on a J10RCDB that I set aside last year. As I recall it ran OK in a tank after I changed the Impeller. But on the water under a load it kept dying out. Compression I tested back then was 80psi on each cylinder. Is 80 too low for this engine?
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    2002 Mercury 3.3hp Gear Shift Adjustment.

    Racer, thanks for the input, I adjusted the linkage to get a full downward stroke, it works fine now in Tank Test. Thanks again.
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    Does my engine have a problem? Or is this normal behavior?

    Is this a 6 gallon fuel tank running a 90hp engine? If so that might be good news because you will likely always be running relatively fresh fuel. Bad news is you might have relatively low Range... Is your "good gas" E10 or (I hope not)E15? Besides the Seafoam are you adding Stabil or...
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    2002 Mercury 3.3hp Gear Shift Adjustment.

    After impeller change out I can't get Shift Linkage adjusted to find Neutral. Shame on me for not taking a photo before disassembly. Stays in Forward gear. Is the Lower Shaft supposed to be pulled Up or pushed Down in order to get into Neutral from Forward ? What is best position for Brass Shift...
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    Evinrude-Johnson 8hp not pumping water

    CrabGuy62, your motor looks a lot like my 1998 Model E8RECR. If yours was a "Frankenstein" put-together motor then I am not surprised the Transom Bracket Model/Serial plate is missing. Many times the Clamps on Transom Brackets get seized so swapping Bracket with an otherwise scrap motor makes an...
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    Evinrude-Johnson 8hp not pumping water

    To order correct Water Pump you need to know the Model Number, not Serial Number. Both should be visible on a Plate on Transom Bracket as well as a silver "coin"/ medallion located on the side of the Powerhead (Cylinder/crankcase casting). Can you find either one of these two?
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    100:1 mix ok in Yamaha 1999 3hp?

    Thanks all for the input. Currently running it at 75:1.
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    100:1 mix ok in Yamaha 1999 3hp?

    Thanks for quick response recommending 50:1 Please disregard comment about 3MSHY vs. 3MSHX, it seems both might be valid Model Numbers .
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    100:1 mix ok in Yamaha 1999 3hp?

    My recently-acquired near-mint condition Model 3MSHY (transom plate is marked 3MSHX--but i cant find parts diagram for 3MSHY) has a decal indicating 100:1. I know OMC did 100:1 for a couple years with bad results, went back to 50:1. Anybody aware of problems that eventually resulted on...
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    Driveshaft into Gearcase 1990 4hp Evinrude E4RESR

    Racer, yes --agreed. I would rather have the engine not going into neutral with fully functional detent vs. getting Gearcase ruined by water intrusion.
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