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Engine Mechanical / Electrical / Low Revving 454
« on: August 20, 2015, 12:11:15 PM »
I started a topic a couple days ago in the "Jet" area but it sounds like I have more of a motor issue if anything.
I have a 1996 (hull number says 95) Hardin Caribbean open bow with a Hardin 454. There is no hour meter and the prev owner did not have any records of motor work; so I have to assume all the internals are original and probably pretty tired.
Right now the revs top out at 4200 and the issue could be any number of things. Below is what I know for sure and I will update as I find out/diagnose more.
Carb: Holley 750 with vacuum secondaries - Hoping to switch to a double pumper so I can know for sure that the secondaries are opening.
Distributor: Small cap HEI with the 8 pin module - When adjusting the timing can I just loosen the hold-down bolt and turn like a conventional dist? I have read that I need to plug into a computer but I don't know if that is only for EFI systems.
I will check the flame arrestor to see if it is dirty and clean/replace if needed. The fuel filter likely needs to be replaced as well so I will take care of that next trip out.
Right now the boat is stored at Lost Lake so I can only get out there to work on stuff every so often. I am planning on bringing it home after this season to have a shop give it a once over. The shops that I always see pop up are GS Marine and BJs Marine in Anaheim. Are there any other reputable shops in the area that would be able to diagnose and repair the motor issues if I cant figure it out? I appreciate all the help as I am trying to learn as fast as possible; I came from the classic car world so much of this is new to me.
Thanks!
I have a 1996 (hull number says 95) Hardin Caribbean open bow with a Hardin 454. There is no hour meter and the prev owner did not have any records of motor work; so I have to assume all the internals are original and probably pretty tired.
Right now the revs top out at 4200 and the issue could be any number of things. Below is what I know for sure and I will update as I find out/diagnose more.
Carb: Holley 750 with vacuum secondaries - Hoping to switch to a double pumper so I can know for sure that the secondaries are opening.
Distributor: Small cap HEI with the 8 pin module - When adjusting the timing can I just loosen the hold-down bolt and turn like a conventional dist? I have read that I need to plug into a computer but I don't know if that is only for EFI systems.
I will check the flame arrestor to see if it is dirty and clean/replace if needed. The fuel filter likely needs to be replaced as well so I will take care of that next trip out.
Right now the boat is stored at Lost Lake so I can only get out there to work on stuff every so often. I am planning on bringing it home after this season to have a shop give it a once over. The shops that I always see pop up are GS Marine and BJs Marine in Anaheim. Are there any other reputable shops in the area that would be able to diagnose and repair the motor issues if I cant figure it out? I appreciate all the help as I am trying to learn as fast as possible; I came from the classic car world so much of this is new to me.
Thanks!
