I just bought a 2006 Robalo with a yamaha f250. Motor checked out perfect on pre-purchase inspection: perfect compression (205 across all 6); no error codes, nothing unusual, no exhaust housing corrosion. Under 250 hours - all fresh water use. Sounded perfect... first time in the water - overheat at idle alarm - crap. Get the boat to the certified yamaha mechanic - one bank running hotter - can't determine the cause. changed waterpump (the entire kit- housing, etc.), changed thermos (one was stuck open), checked poppit - still overheating. I assume blockage somewhere - they tried back flushing several times - nada. I'm the talk of the shop - for all the wrong reasons.
appreciate any and all suggestions.
Is it me, or do these engines require a lot of TLC? In addition to running ring free, checking the exhaust housing for corrosion every two years, worring about VST and oh yeah - oil pump issue on these engines may require removal of powerhead to repair at some point in the future -- what's next?
appreciate any and all suggestions.
Is it me, or do these engines require a lot of TLC? In addition to running ring free, checking the exhaust housing for corrosion every two years, worring about VST and oh yeah - oil pump issue on these engines may require removal of powerhead to repair at some point in the future -- what's next?