EFI to carb swap, what all will be needed
02-21-2017, 06:30 AM
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EFI to carb swap, what all will be needed
Changing the top end on my 1999 454 MPI mag to intake and carb. What all will I need to do this? My concerns are wiring harness, fuel pump, currently has the cool fuel system on it, and if current throttle cable will work. I have a thunderbolt IV ignition off another boat I plan on running. I'm sure there are things that I am not thinking of.
02-21-2017, 07:58 AM
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Its a easy swap, the EFI harness is stand alone, as far as merc dist is concerned not sure but a early one would work for sure, I usually run a H/P HEI on these and works well. you will have to set up a low pressure fuel pump as you only need 6-7psi, I used elec in the past as I dont care for the mechanical pump run from water pump.
