Quote:
Originally Posted by twoton
Good point there by johncub7172.
and... the importance of proper engine block grounding cannot be over stated.
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Thanks twoton! I have also added an extra engine ground to my 1450, which will ground the engine to start with the starter cable ground removed.
After an hour of run time, and shutting off, could it be carbon deposit? Might need to remove the head, and inspect the situation. If we have an exhaust valve moving slowly, we will loose a certain amount of piston compression, and slow down the 1250 to a crawl. Try a compression test? I recommend to start using Marvel Mystery Oil in the fuel. This stuff will begin to clean up the combustion chamber. Being here since 2009, I have used this stuff off and on and have not ever experienced a slow down in my engines.
Only points of consideration, hopefully we can get some more good ideas on this 1250 scenario.