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    Crazy high tach reading 90 hp 2 stroke

    End of last season my tach would go from reading properly to as high as 7500 rpm without the engine rpm increasing. It would sometimes come back down and other times it would vary between 6000-7500. I opened up the main harness connector for a look and re-seated every connector under the hood...
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    1999 2 stroke 25 hp spitting unspent fuel out the exhaust

    I have been trying to find out why the engine is spitting unspent fuel into the water behind the engine. You can see droplets behind the engine while it is idling. Prior to this issue the engine had been been very severely overheated to the point it melted the oil tank. The idle speed is...
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    1983 7.5 low full throttle power

    Hello folk's, I would appreciate some thought's regarding the compression of a little 7.5 that I have gone over from end to end and it still lacks power at the top end. It runs real nice at idle and spins up the rpm in a test tank, but under load it will not put out. As part of the maintenance...
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    1962 6 hp needle and seat question

    1962 6 hp Merc serial number 1489784 Cleaning up the fuel system to get the engine going after years of storage and the float needle and seat are like no other I have ever seen. The float seat does not have a tapered bottom in it for the needle to seal against. Said differently, the needle...
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    2000 50hp 2 stroke losing rpm, know it is ignition, suspect CDI

    Hello folk's, I am hoping to see if anyone can help me confirm my suspicions that my CDI is failing. I have put up with the problem long enough to be able to reproduce it every time I am running it. Here is what I have been able to observe: At a given throttle position (3600 rpm), after about...
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    1959 35 hp high speed jet significantly effecting idle question

    Hello, I am working on a beautifully restored 35 hp Lark that has a strange (to me) fuel delivery issue. I suspect it has had this problem since being restored a few years ago and the owner didn't recognize it wasn't running like it should. The high speed jet needs to be almost completely...
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    Increase 9.9 OMC idle speed by drilling larger hole in throttle plate?

    I would like to see if there are opinions out there on drilling the holes slightly larger on the throttle plate to try and get a faster idle speed? A bit of background... I am talking about the electronic ignition 9.9 & 15 hp OMC's built from approx 1978-2007. I have worked on these little gems...
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    2000 25 hp Johnson charging wire identification

    Hello folk's, I have a 2000, 25 hp Johnson, manual start Model J25RSSE that has 3 wires under the hood with protective caps on them. The wires come from the stator and I assume they are for charging a battery. The wire colors are solid yellow and two yellow wires with blue stripes. Would...
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    Nissan 15hp float needle parts

    Hello folk's, I have a real low hours 15hp Nissan model NS15B2 that needs a new float needle and I am reading that the part may be obsolete. How can this possibly be the case given the engine is only a 1992 model??? With the volume of these engines around I'm hoping to find someone who has...
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    Help finding FAQ?

    I must be blind as I am not able to find the FAQ section, could someone point it out to me?
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    50 2 stoke Yamaha going into limp mode with no alarm?

    Hello, I am hoping to get some suggestions on how to diagnose why my 2000 50 hp would go into what seems like limp mode. It will run fine at <1500 rpm and shut down at any rpm above. Have tested the alarm and it works when temp sensor wires are bypassed and connected together.Have replaced the...
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    15 Johnson stalls when coming off plane

    Hello folk's, I have a 1984 15 hp Johnson (new to me) that will stall if I suddenly slow down from being on plane. It will always start right up again and run properly afterwards. It will do it every time I come off plane if I slow down suddenly. As a course of maintenance I have replaced my...
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    15 Johnson poor running at high speed

    Hello folks, I have a 1988, 15 hp Johnson model CE15RCCS with a high speed running problem. I have a fair bit of experience working on two strokes, but this one has me scratching my head. Engine runs very good at idle and low midrange, but won't accelerate to full throttle. It doesn't seem to...
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