I was out at the weekend (first trip of the season) on a fishing trip to Peterhead.
We launched at Cruden Bay, so roughly a 5 mile trip up the coast. I serviced the engine during the winter, stripped the carbs (no adjustment to the idle screws), replaced impeller, new gear oil, new sparks, new fuel, cleaned inline filter on engine and replaced water separating filter in console, cleaned thermostat and renewed gasket, etc.
The engine ran fine, but seemed to require extra choke and fast idle even after running. We weren't successful fishing, so headed down the coast and anchored in a bay. After restarting (and idling for 5 mins) while I stowed the anchor, the engine buzzer came on when put into forward. The sunlight was strong (to view the low oil warning light on the tacho) so I wasn't sure what the warning was for. I actually thought it was a low oil alarm. There was plenty oil - but rather than chance it with a possible Autolube fault, I added enough oil for what was left in the 25 litre tank. Worst case scenario it would smoke like an E Class frigate! Better that than seizing.
After opening up the throttle - the buzzer cleared. The tell-tale was normal. The Tohatsu normally pees like a horse!
What do you reckon? Take off the water jacket to investigate, or look at replacing an overheat sensor? Knowing Tohatsu the sensor will be the same price as plutonium on the black market. If I take off the jacket - it will require a new gasket, etc.
Engine is 2006 M60C 2-stroke. It's always flushed after use. The buzzer sounded briefly last season but cleared.