1977 Mariner 85hp Loses power after warming up...Help Please!

phearly

Cadet
Joined
Mar 19, 2011
Messages
13
Hi,
When put it in the water the engine performs pretty well & will plane out for a while. After a while though the power seems to dramatically reduce and almost sounds like maybe it is missing on a cylinder? I am suspecting that maybe either the power pack, stator, or one of the coils is getting hot and flaking out. Any ideas? If it's the power pack or stator, is there a good way to test for this? Thanks in advance.
 
Joined
Sep 8, 2011
Messages
12
Re: 1977 Mariner 85hp Loses power after warming up...Help Please!

Sounds like you have a compression loss,Check all cylinders first cold,then Hot,
 
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