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Old August 13th, 2004, 12:22 PM
BoneDigger BoneDigger is offline
Seaman Apprentice
 
Join Date: Feb 2004
Location: Texas
Posts: 32
Default 90 HP Mercury idling issues...

This is a 2000 model 2-stroke "classic" design. It does well at idling speed when I am trolling, but when the boat is in neutral, it will run great for a short time, sputter, then shut off. It cranks right back up, runs fine for a minute or two in neutral, sputters and dies. Cranks right back up... It will troll at 2.5 mph all day without a hitch. Any ideas?Todd
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  #2  
Old August 13th, 2004, 02:45 PM
steam_mill steam_mill is offline
Chief Petty Officer
 
Join Date: Jan 2002
Location: Toronto
Posts: 403
Default Re: 90 HP Mercury idling issues...

I've got the same engine. The same thing happens to me when I first start it up if I have not either pumped the bulb at least 10 times or not have moved the idle lever (?) far enough.When warm, it will not stall. I suspect your idle may be too low. What are you idling at?Joe
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Old August 13th, 2004, 10:05 PM
Wellcraft 89 Wellcraft 89 is offline
Petty Officer 2nd Class
 
Join Date: Aug 2002
Posts: 158
Default Re: 90 HP Mercury idling issues...

Are you having any high rpm surging at all ?chk fuel vents chk your air mixture screws,mine had the middle one ,not the same as the bottom and top from the factory ran okay first couple times out when new ,but started to stall the same as yours.adjusted runs fine now.fuel pump could be starting to act up also carbs could be dirty or gummywhat do the plugs look like? all the same or one different?Rich
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