My old 115 Yamaha is not well!

gio

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I opened up my old Yamaha 115 that was running badly and this is what I found... 20170527_105245.jpg20170603_144137 (2).jpg 20170603_142551.jpg
new gaskets on the way! You think this was the problem, or the gaskets looks OK???
 

gio

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Bad gaskets...or????

20170527_105245.jpg 20170603_142551.jpg 20170603_144109.jpg I was having problems with my old Yamaha 115, running like on three cylinders, so I open it up and this is what I found. What do you think??
 

gio

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20170603_144109.jpg
I was having problems with my old Yamaha 115, running like on three cylinders, so I open it up and this is what I found. What do you think?? Looks like it needs new power head gaskets..or they look ok???
 

GA_Boater

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Three threads on the same problem? The three have been merged into a single thread.


Did you do any testing or just tore it apart. A compression test may have shown the reason for the poor running. It's too late now to guess if a head gasket was blown.

Which cylinder did the watered plug come from?
 

99yam40

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exhaust plate is another place that gets holes and lets water into cylinders
 

gio

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I am sorry! I did not realize that those post went up...my computer was been funny at that time. I wanted to post only once.
No, I did not do any tests, I tough I would have been able to see if there was a problem in there... and where in the world is the exhaust plate???
 

gio

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number three cylinder is the one with the wet plug...I have ordered some head gasket. I hope that will fix the problem.
 

99yam40

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how old is old?

Ok does this motor have a Model # on it you can post?
that usually lets everyone know what motor is being talked about

look at a parts breakdown for exhaust plate
 

99yam40

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do a search for 6N7-41113-00-9M OUTER COVER, EXHAUST and its gaskets and inner plate
 
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