Repowering with 4.3L V6?

This forum is for comments and the exchange of information relating to Trojan Boats and boating. Please do not post used parts or boats For Sale in this area. For general, non-boating topics please use our "General Discussions" section.

Note: Negative or inflammatory postings will not be tolerated.

Moderators: BeaconMarineBob, Moderator, BeaconMarineDon

Registered user
Posts: 1
Joined: Mon Sep 25, 2023 8:36 am

Re: Repowering with 4.3L V6?

Post by Bedford29 »

I'm wondering if this repower ever happened as I'm interested in a similar feat with my 305s. The fuel injected 4.3l seems so much better that 2 4bbl 305s.... If I wanted speed I would've bought something with 454s.

I have a 1979 trojan F30 express convertible.
1979 trojan F30 express
1970 searay srv190
1987 glastron
1959 bellboy banshee
User avatar
2024 Gold Support
2024 Gold Support
Posts: 12663
Joined: Sat Nov 05, 2005 6:56 pm
Location: Lower Chesapeake Bay ,Va

Re: Repowering with 4.3L V6?

Post by prowlersfish »

The OP did not do the repower.
My thoughts

I don't see why it would not work. Being fuel-injected you should see a slight gain in fuel economy. They may have to work harder to get on plane as maybe less tourqe. The main issue I see would be some vibration. The 4.3 is not as smooth as a V8 even the ones with a balance shaft. I doubt you will find the 4.3 efi "so much better than the 305" If you need to repower it is certainly an option. if your 305s are in good cond keep them.
Boating is good for the soul
77/78 TROJAN F36 Conv.
6BTA Cummins diesels
Life is to short for a ugly boat :D
Post Reply