Switching from Volvo TBI to Carb on a 1996 5.7 GI

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camboat

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Thanks
I haven’t touch the timing yet. Both the TBI and carb are set to 8 deg TDC. I will sea trail it and see what it does under a load.
 
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camboat

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Ran the engine in the driveway to check everything out before taking the boat out for a sea trial. After running for ten minutes I could smell I very faint gas odor. I shut everything off. The fuel pump is barely leaking (red arrow) where the motor canister is pressed on the inlet housing. I called Carter. Not much help. I will return it a try one more Carter pump 🤞🏻. Not sure I trust the Carter fuel pump. Maybe that’s why it’s so noisy. All of the fitting are dry.
 

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camboat

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Permatex gas proof sealer
Is this the wrong stuff for thread sealer? The threads are not leaking
It’s the pump.

If there is something better, please let me know.

Thanks
 
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camboat

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Is there a better electric fuel pump than the Carter? I don’t like it that a brand new pump is leaking in my engine compartment. I have a replacement Carter pump coming. I may send it back and find a better pump.
 
alldodge

alldodge

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Permatex Aviation Sealer

Carter makes a good pump and if the pump and I'm skeptical it's actually leaking there. I would think it's leaking at the fitting

The part that screws into the pump is NPT right?
 
Lou C

Lou C

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Looking at the edge of the outlet, is that casting flash or a crack? I think casting flash. I think those threaded ports on the pump are usually NPT but on the three carbs (Q-jet, Holley & Edelbrock) I have for the fuel inlets they use straight threads and a double flare fuel line fitting. Might be a good idea to go back & check, I have a set of regular thread chasers and ones for NPT threads.
 
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camboat

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Dec 1, 2025
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The outlets are outside of the area that is getting fuel in. The fittings aren’t leaking I double checked with a paper towel while the engine was idling. I pulled it and returned it. It was also really noisy. I had it mounted on 3/4” rubber spacers. I’m not taking any chance for a fuel leak. I ordered a Walbro FRB-13-2.

Thanks
 
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