1998 90 hp Merc. Idles fine won't go fast.

glenng

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Jul 7, 2003
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I have a 1998 Merc 90 hp on a 17 ft fisher bass boat. Motor has always run great until recently. All of a sudden when I try to give it full throttle, it has no power. Won't get on plane. Seems like it is running on 1 or 2 cyls. I replaced plugs, fuel filter, and last night took the carbs off. I intend to clean them throughly and put them back on (I Hope!) The bottom 2 carbs had some muck in the bowls that looked like dried up fuel/oil mixtire. Top one was clean. Any Suggestions??? :(
 

natural life

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Jun 28, 2003
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Re: 1998 90 hp Merc. Idles fine won't go fast.

Check your diaphram in your fuel pump. Sounds like it's starving for fuel.
 

glenng

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Jul 7, 2003
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Re: 1998 90 hp Merc. Idles fine won't go fast.

I'll check diaphram...Would there be something obvious to look for? I already took it apart to look at it and it didn't seem to be busted or anything...Thanks for the help. :)
 

glenng

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Joined
Jul 7, 2003
Messages
3
Re: 1998 90 hp Merc. Idles fine won't go fast.

I'll check diaphram...Would there be something obvious to look for? I already took it apart to look at it and it didn't seem to be busted or anything...Thanks for the help. :)
 
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