Re: Johnson TD20 / TN26 etc. – T-shooting Part 2

[legendre]

quote ShoestringMariner:

You might be on to something here…as the impeller tube terminates at the base of the powerhead…could be flowing water in the exhaust, though would it not be pushed back out by compression/airflow?

You’d think, but then again.. I can’t just dismiss anything at this point, as the dang thing runs for crap and nothing seems to help it.

quote :

What about a cracked block? I’d think a crack would get larger as the block heats up, would it not?

This is a real possibility. Prior to the POs messing with it, the motor was left sitting for many years, and one needs to ask just why that was.. It may have simply been un-needed, but then again, it may have been seriously screwed up and set aside to be fixed at some later date. Maybe the poor thing froze with a full water jacket or some such awfulness?

Thing is, I had it totally apart, and didn’t see anything that looked like a crack in the cases.

Anyway, it’s all apart again, except for splitting the cases. Careful inspection is next..

One obnoxious thing, though. When I pulled it apart, the +new+ carb flange gasket was torn, badly. So did that happen during disassembly, or..?

Ack. A grand worth of time into a $150 motor! =P