gulllake550
08-04-2009, 09:47 AM
Picked up some sand in the bottom end when parking the boat at a friends place. Replaced the impeller and have normal water pressure. 8lbs at idle and 15 once on plane. Runs good and cool at idle and mid range speeds. Alarm goes off when running above 5000 RPM and one head (starboard) side is warmer then the port side. I am thinking stuck thermostat or jammed poppet valve. It is a 1992 Yamaha Pro V. Does this engine have just one poppet valve?
Any input would be appreciated
Any input would be appreciated