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Discussion Starter · #1 ·
I have a 1996 15 HP Yam. Starts up easy, idiling is rough. New plugs helped a little. It does not come up to full power when running. Noticed raw fuel emulsion in prop exhaust when flushing. Any ideas would be appreciated.
 

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Full tuneup and a carb rebuild is what I'd do. Sounds like you're running rich.
13 year old motor, when was the last time it had a complete service/lube top to bottom?
 

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Discussion Starter · #3 ·
Just got the engine, doesn't look like it's ever had anything done to it. I was just trouble shooting it and the #2 bottom cylinder is not firing. Getting plenty of fire through the plug. Pull the #1 plug wire while running and it dies. Pull #2 pluge wire and it keeps running. It's going ot the shop.
 
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