would a vaccum advance be an advantage?

[flashback]

I have a 1979 chris craft with a 350 cid engine and a conventional ignition with points and condenser. it does not have a vaccum advance. Would this be an advantage to have? by the way, this is a mercruiser

 

[daveswaves]

Re: would a vaccum advance be an advantage?

Short answer, no. Works for cars, not for boats. Leave the mechanical advance distributor in.

 

[flashback]

Re: would a vaccum advance be an advantage?

thanks Dave, I would guess it has something to do with the constant load on the engine the vaccum does't change that much. anyway, thanks again.

 

[petryshyn]

Re: would a vaccum advance be an advantage?

The vacuum advance is designed for lean mixtures (light load) occuring at moderate RPM. This is something a boat never sees....

 

[hondon]

Re: would a vaccum advance be an advantage?

Vacume advance in an automotive format works well because as you head ,coasting ,downhill, with your foot out of it ,your engine including your distributor are turning the rpms that they are but there is no vacume to advance the timing thusly no nasty backfires etc..When are you ever in that situation with your boat?