So I got a bit ham fisted when removing my raw water pump this past weekend on my new to me Catalina 30. In the process, I removed the speed control adjusting bolt, number 1 in the parts diagram, red circled item just above the raw water pump in the second picture.
From my understanding this affects the fuel mixture under load at or near wide open throttle. There appears to be no specs or procedures for setting and/or adjusting the Speed Control Adjusting Bolt in either the owners or service manual for the Universal M25XP.
If anyone has any suggestions for the initial setting of the screw when reinstalled, or even wouldn't mind measuring their own, ie screw length protruding out from the locknut with the tamper cap removed.... It would be greatly appreciated.
It has been suggested to me, to adjust it out until black smoke is present in the exhaust at full throttle under load, and then adjust back it in a 1/4 or 1/2 turn from there until smoke disappears or is intermittent at best. Basically finding the rich end off the fuel mixture spectrum and backing away from it.
While I am new to the world diesel engines, I am very experienced building/rebuilding, and tuning motorcycle engines. So this makes sense as it's generally safer, albeit dirtier, on the rich end of the spectrum when it comes to air/fuel mixtures.
Any help or suggestions welcome. Thanks in advance for your input!
From my understanding this affects the fuel mixture under load at or near wide open throttle. There appears to be no specs or procedures for setting and/or adjusting the Speed Control Adjusting Bolt in either the owners or service manual for the Universal M25XP.
If anyone has any suggestions for the initial setting of the screw when reinstalled, or even wouldn't mind measuring their own, ie screw length protruding out from the locknut with the tamper cap removed.... It would be greatly appreciated.
It has been suggested to me, to adjust it out until black smoke is present in the exhaust at full throttle under load, and then adjust back it in a 1/4 or 1/2 turn from there until smoke disappears or is intermittent at best. Basically finding the rich end off the fuel mixture spectrum and backing away from it.
While I am new to the world diesel engines, I am very experienced building/rebuilding, and tuning motorcycle engines. So this makes sense as it's generally safer, albeit dirtier, on the rich end of the spectrum when it comes to air/fuel mixtures.
Any help or suggestions welcome. Thanks in advance for your input!