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1993 Mariner Outboard Idle Problem

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okmacman

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"I have a '93 40 HP Marine

"I have a '93 40 HP Mariner outboard with new sparks, carbs adjusted by mechanic, and brand-new gasoline. Runs great, but problem is when I bring it back to the marina and am idling in gear through the no wake zone, it will bog down and die.

It will restart, but most of the time I have to lift the fast-idle lever and choke it to start it again.

It was doing this before I took it to the shop and it is still doing it afterward after mechanic adjusted carbs and cleaned the still new plugs. What can I look at next?"
 
Time to clean the carb(s&#

Time to clean the carb(s) - sounds like either a clog developing in the low speed jet or a sticky float valve.

Having to adjust a carb is the first sign of a future problem. They don't go out of adjustment on their own.

Readjusting is a temporary fix for a proper cleaning at a later time...
 
"Oops, looks like I forgot to

"Oops, looks like I forgot to put that the mechanic cleaned and adjusted carbs. Sorry. He told me he removed, cleaned and adjusted both carbs."
 
Try pumping up the bulb on the

Try pumping up the bulb on the fuel line (or pumping it when it's having trouble either starting or idling) - if that helps the fuel pump may need servicing (usually a new diaphram).
 
"What year is my Motor? It&#3

"What year is my Motor? It's a Mercury Mariner
5hp 661 air cooled made by Yamaha,
Serial# S43343"
 
"Can anyone tell me what year

"Can anyone tell me what year my motor is? I have
a Mercury Mariner 5hp 661 air cooled made by
Yamaha, Serial# S43343."
 
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