The Universal M25 (5421) on the Ericson 33 I sail has not been starting easy or running normal since launch in May. Once started, it coughs and chokes at idle to the point it stops running, but if we keep the RPM at 800 or above it runs OK. We added injector cleaner to the fuel tank to help if it's a clogged injector, but no noticeable change until a few days again. Now, after operating in this manner for 3-4 weeks, the engine will only turn 1900 RPM at wide open throttle. Running the engine at 1500, we cracked the nuts on the three injector lines and had a big decrease in engine performance on the #1 and #2 cylinders, but the engine operation did not change when the fuel flow to the #3 cylinder was interrupted. Pulled the #3 injector and compression tested the cylinder; 250psi. Tested #1 cylinder as point of reference, also 250 psi. Thinking of taking the injectors to a shop to be cleaned and tested...
So after that long story, I'm looking for guidance on next steps and if anyone knows what the compression should be for the cylinders of the M25. I found two different compression ratio's in the manual I've found on the internet (22:1 and 21:1).
Thanks in advance for any help!
So after that long story, I'm looking for guidance on next steps and if anyone knows what the compression should be for the cylinders of the M25. I found two different compression ratio's in the manual I've found on the internet (22:1 and 21:1).
Thanks in advance for any help!