Turn ingition key, push the button, engine
starts.....yes but in this case (after being away from the boat for 5 weeks) the pushbutton stuck in. Unknown to me under the waterproof rubber shroud
the pushbutton had failed to return. Result...engine started but the starter was still being powered and spinning. The outcome was a trashed starter...replacement price
$1000 from Yanmar
I shopped around and found a replacement Hitachi starter for $210 delivered.
I lubricated the pushbutton switch and now check/ feel each time I start the engine
that the start button has sprung back out.
I was lucky this happened in a marina during routine engine running.