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  #1 (permalink)  
Old 04-20-2012
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Default leaking carb

i have a 1987 yamaha 9.9sh 2 stroke and it was running fine just seemed a little under powered so i decided to clean the carb that was apparently not dirty ... put it back on and engine runs fine yet gas is leaking from the screw underneath the bowl when it is running ... is the float stuck perhaps ??
thanks for any help!
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Old 04-21-2012
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Default

Probably have a bad bowl or screw gasket.
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Old 04-21-2012
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Default what is cause of bowl leaking on yamaha 9.9 outboard

Ok but also the screw that hods the bowl in place from underneath it slides into the bowl and holds it that screw is leaking like i have said but also this screw has a hole that goes through it and when it is set into place and screwed in their is also a passageway through the bowl and i dont know perhaps i just dont have the screw and passageway lined up correctly?
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Old 04-21-2012
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Default photo of carb leak issue

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Old 04-21-2012
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if it is leaking you need a new gasket/oring for it
http://www.boats.net/parts/search/Ya...%29/parts.html

looks like 39 or 41
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Old 04-21-2012
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ok thanks, but would you have any idea as far as what the orientation of that hole in the screw which goes into the bowl ? fully aligned with the insert hole so gas flow through 100% un obstructed or perhaps 25% 50% etc. ? all i remember from when i took it out to clean it is that it was somewhat tight but dont remember if it needed to be a particuliar orientation
-thanks
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Old 04-21-2012
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more than likely needs to be somewhat tight, yes
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