WENT WITH MORE HP. (chevy 305 to 350). DO I NEED TO MODIFY OUTDRIVE?

[Buck Horn Deer Farm]

I replaced the old tired mercruiser 228 chevy 305 with a good used mercrusier 260 chevy 350 in my 1977 24' sea ray for a bit more power. Will I need to do anything in the outdrive its self? I know I may need to change the prop.

 

[Don S]

Re: WENT WITH MORE HP. (chevy 305 to 350). DO I NEED TO MODIFY OUTDRIVE?

Nothing in the drive needs changed. Same gear ratio for both engines.

 

[Gettinther]

Re: WENT WITH MORE HP. (chevy 305 to 350). DO I NEED TO MODIFY OUTDRIVE?

I replaced the old tired mercruiser 228 chevy 305 with a good used mercrusier 260 chevy 350 in my 1977 24' sea ray for a bit more power. Will I need to do anything in the outdrive its self? I know I may need to change the prop.

Just did the same engine conversion last year on a 20 ft. crestliner crusader , no drive changes necessary , just your prop and I like mine

 

[StevenT]

Re: WENT WITH MORE HP. (chevy 305 to 350). DO I NEED TO MODIFY OUTDRIVE?

You should notice a better hole shot and better up on plane time.