So I already fried my engine
or maybe I did -- but I know it dangerously overheated.
I was motoring back in from a great sail when I saw a faint bit of steam/smoke coming up from the engine
area and immediately turned off the engine, the steam/smoke immediately got much worse, I'm glad I turned it off immediately but I'm worried I might have run done some damage, it smelled like burning coolant
I think and today in my troubleshooting/investigating I found:
1. Impeller was totally eaten (could have been the cause of the overheat, or the result)
2. Sea cock was open, I tested it today and waters come out of it, though I'm not sure if enough is coming out -- it was like a garden hose without any sort of end on it (and this is after the strainer) a steady stream but not exactly powerful
3. I can't get my strainer open? I've never opened it before (only had the boat for 8 weeks, and had the engine checked out before I sailed it the 80 miles from Hilton Head
up to Charleston) it looks like a standard old style strainer, like the top should twist off and then the strainer lift
out? I must be missing something
4. The zinc on the heat exchange was totally eaten, but it also looks like the zinc is still in the heat exchanger
? I'm not sure if it's corroded -- picture to follow, how do I get the zinc out to put a new one in?
5. I couldn't get the end of the heat exchange off to check for clogs, I was able to get the bolt off the end but not the cap -- do I just need to dig into it and give it some force or ?
6. The top of the coolant
recovery tank was blown off (eek...bad sign) how did that happen? The coolant burning up?
was only running for a few minutes total, but I know a few minutes can be a few minutes too long -- I'm going to replace the impeller with another Johnson 810, check the strainer (once I get the damn thing open) and the zinc.
What kind of coolant should I use? Do I need to flush the cooling
system? Once I replace the impeller/zinc/coolant/check heat exchanger
should I start it and see how it runs or are there other things I should check after a dangerous overheat? Any tips for a newbie to tell just how bad he f'ed up?
Thanks for all your help and advice.......