48hp evinrude won't idle

ctsoe42

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Sep 16, 2013
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Motor sat 5 years with no gas in carb. I cleaned the carbs. It runs great, except it wont idle in neutral. I have to throttle up the enging then quickly put it in gear or it will die. I used carb cleaner in spray can. Is that enough pressure to clear debris or do I need to pull them again and use compressed air? Could it just need the idle speed increased? If so how could the idle have gotten out of adjustment? All adjustments were put back exactly as found.
 

Daviet

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Sep 24, 2008
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Re: 48hp evinrude won't idle

Welcome to the forum.
When you cleaned the carbs did you take them apart or just spray cleaner in them?
What model number engine do you have?
 
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ctsoe42

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Re: 48hp evinrude won't idle

I took the carbs completely apart. Because the gas was drained prior to parking the boat for 5 years, the carbs were not that bad. I took the time to clean them very thoroughly.
You think I should have cleaned the reed valves or gas lines going to the carb? Is there an idle adjustment? If so, why would it be off. I put all adjustments as I found them.
 

Daviet

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Re: 48hp evinrude won't idle

Could you post a model number so we know exactly what engine you have?
 

boobie

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Re: 48hp evinrude won't idle

Have you checked the compression on it ?? Another thought. Rings could be stuck from sitting. Do a GOOD decarb on it.
 
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ctsoe42

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Re: 48hp evinrude won't idle

Sorry, its been raining every day here. I havent been able to work on the motor.
Ill take a pic of the name plate tomorrow. Its a 1990 48 spl.
Ill also do a compression check tomorrow as well and post results.
I thought i would take the diaphram pump apart and check it.
 

Daviet

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Re: 48hp evinrude won't idle

I wouldn't mess with the fuel pump unless it tests bad.
 
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