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Discussion Starter · #1 ·
I have a 99 Johnson 50hp 2 stroke. When I first got the motor last year I had to replace the computer. I also did the spark plugs and all fluids.

It has run great except for one thing. When I put it into forward gear just above neutral it will stall out after about 45 seconds to a minute. The engine will vibrate some and just die. I need to go slow in the canals in Winter Park. All else is well.

I think maybe I need to clean the carbs? Would this help?
 

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Check your tachometer, it sounds like your idle rpm's aren't high enough.
Check your manual, I set my idle rpm's while in the boat on the water, with the engine in forward gear.
 

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Discussion Starter · #3 ·
I dont have a tach but that sounds like it may be a solution. How would I go about setting my idle rpm? Is there a switch or something? I dont know much of anything about motors.
 

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Idle adjustment screw,
either on the shifter (older models)
on the carb on most models.
If you know very little about working on engines,
take it to a reputable outboard mechanic for a tune up.
If you can change a spark plug and follow instructions
then get the OEM Shop manual for your motor.
It'll show you what to do and how to do it.

OEM = Original Equipment Manufacturer
 

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Does it run fine otherwise? Only stalls when at idle in gear, after about 45 seconds? Probably idling too low if so.

On land with the flush muffs attched, I assume it idles just fine? With no backpressure and no engine load it should idle nice and low without stalling, but in the water, well that changes everything!
 

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Discussion Starter · #6 ·
Yes it runs fine other than the issue I'm speaking of. So I need to adjust the rpm it sounds like.
 

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Discussion Starter · #7 ·
So I have the manual.seloc. I have looked for idle adjustment and cannot find it. Is there a technical name I should look for? The closest thing I found was the IAC valve but I don't think thata what you are talking about. Any suggestions?
 
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