Originally Posted by Nos4r2
Hmmm... 50hp, 2 cyl , and old tech at a guess.Prob no beeper.
Either get an IR thermometer and point it at the block while it's running, or a more basic way is to extend the pee hose to above the powerhead and see if it carries on peeing. If it doesnt, your water pressure isn't enough to reach all the block. That won't tell you if your cooling system's blocked though, just that you've got enough pressure.
Don't think I do, I have a beeper that tells me when the oil level is getting low....