I have a 03 225 ox66 with 20 hours on it and when I run at wot, trim the same, and no changes in the water condition my gauge will go from 15psi to 22psi. It just bouces back and forth. Any thoughts would be greatly appreciated.
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I have a 03 225 ox66 with 20 hours on it and when I run at wot, trim the same, and no changes in the water condition my gauge will go from 15psi to 22psi. It just bouces back and forth. Any thoughts would be greatly appreciated.
Sounds like the Poppit valve.--- May need to be cleaned or updated. Usually the first thing to look for. Aside from that--maybe the impeller. Both repairs are pretty easy.
Check the first post on this (Yamaha)page. It shows the poppit location. http://www.bassboatcentral.com/boardstuff2/beers.gif