4.3 to 5.7 swap, wiring diagram

[OK12V]

1999 Volvo penta sx cobra in Glastron SX 195 . I just swapped 4.3 to 5.7 and need wiring diagram. It sure looked simple while disassembling, but now that new engine is in and 2 month later I cant recall what wires go where. I read countless swap threads but can?t find what I need. Everything should hook up just like on 4.3 so diagram for 4.3 is what I need. Please help!

 

[OK12V]

Re: 4.3 to 5.7 swap, wiring diagram

I dont know if mercruiser diagram same as volvo? There is plenty of that online

 

[Don S]

Re: 4.3 to 5.7 swap, wiring diagram

No, they aren't the same as Mercruiser. Is the engine carbed or EFI? Is the 5.7 the 99 or the 4.3? Are you trying to use the 4.3 wiring on a 5.7? What ignition are you using on the 5.7? Is it the same as was on the 4.3?

 

[OK12V]

Re: 4.3 to 5.7 swap, wiring diagram

Thanks for the reply. 4.3 was carbed vortec 1999 engine. I rebuild 1999 5.7 vortec truck engine with marine parts and gaskets. It is 4bbl carbureted now also. I have marine V8 distributor. I am reusing 4.3 wiring harness and other parts and sensors that are interchangeable

 

[Don S]

Re: 4.3 to 5.7 swap, wiring diagram

Here is for the WT (1999) 4.3 engine.

View attachment 43wiringWT.pdf

 

[OK12V]

Re: 4.3 to 5.7 swap, wiring diagram

Oh man! Thanks a million!!!

 

[OK12V]

Re: 4.3 to 5.7 swap, wiring diagram

I am close to be done with this swap. My risers are 2” further now and exhaust boot is too short. It is original riser and boot is 4.5” long. Anybody sells 6.5” boots? All I can find is original size and they say it works for V6 and V8. Any trick to that?

 

[rricher]

1999 Volvo penta sx cobra in Glastron SX 195 . I just swapped 4.3 to 5.7 and need wiring diagram. It sure looked simple while disassembling, but now that new engine is in and 2 month later I cant recall what wires go where. I read countless swap threads but can?t find what I need. Everything should hook up just like on 4.3 so diagram for 4.3 is what I need. Please help!

I may do the same swap in a 1997 Sea Arrow V-200. Any guidance or warnings?