captain_ed
Regular Contributor
I am trying to replace the distributors on both my standard and reverse rotation engines. The springs inside are rusty and I don't trust that they are working correctly. I am currently working on my starboard (reverse rotation) engine and have not touched the port engine yet. I just had the heads rebuilt by a machine shop that does a lot of marine motors. My original heads had cracks around the spark plugs probably caused by heat, bad timing, or possibly bad timing advance. Whatever the cause was, I don't want it to happen again. I am trying to eliminate the possible causes.
I was given a brand new Mallory YLM578 AV marine distributor. Mallory says that this distributor will work for either the standard or the reverse motor. I pulled the reverse 440 distributor and compared it to the Mallory and they don't match up. I called thier tech support and they say that this is the only chrysler 440 marine distributor and it should work for either motor.
View attachment 6434
The distance from the base of the distributor (just above to o-ring) to the end of the shaft is different. The original distributor measures 4 3/4" and the new Mallory measures 4 1/8" long.
Even if I left the "thrust bearing" off, it would still not be the correct length.I don't know why the reverse motor would need a thrust bearing. There is no gear on the end of the shaft that would create thrust. I am confused and frustrated.....
Does anyone have experience with this? Any ideas???
I was given a brand new Mallory YLM578 AV marine distributor. Mallory says that this distributor will work for either the standard or the reverse motor. I pulled the reverse 440 distributor and compared it to the Mallory and they don't match up. I called thier tech support and they say that this is the only chrysler 440 marine distributor and it should work for either motor.
View attachment 6434
The distance from the base of the distributor (just above to o-ring) to the end of the shaft is different. The original distributor measures 4 3/4" and the new Mallory measures 4 1/8" long.
Even if I left the "thrust bearing" off, it would still not be the correct length.I don't know why the reverse motor would need a thrust bearing. There is no gear on the end of the shaft that would create thrust. I am confused and frustrated.....
Does anyone have experience with this? Any ideas???