Home › Forum › Ask A Member › Johnson TD20 / TN26 etc. – T-shooting Part 2 › Re: Johnson TD20 / TN26 etc. – T-shooting Part 2
If the base gasket were bad (internally) could it cause water intended for the cooling loop to be pumped into the exhaust manifold, where it then enters the lower cylinder, causing all kinds of crappy running?
Because it really does start up great when cold, but then goes way downhill in about 5-10 seconds.. and the longer it runs, the worse it runs.
I’d appreciate any thoughts.. but I’m probably going to pull it apart anyway – as I’m at a total dead-end.
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?
What about a cracked block? I’d think a crack would get larger as the block heats up, would it not?