1986 20 ft Tiara with 5.7 260 hp Mercruiser

[dan2744]

Hi guys, I just picked up this boat and the motor was completely full of water, I was wondering if there was a similar motor that I could replace this with where Everything would be compatible and bolt on. Im not even sure how this much water got into this thing. Any help is appreciated.

 

[Bondo]

Ayuh,..... It's just a 350 Chevy long block, with the Merc accessories bolted to it,....

If it is truely an '86, it'll have the 1 pc. rear main seal,.....
If it's a '85 hold-over, it could be a 2 pc. rear main seal,.....

That has to be determined, before ya go shoppin' for a replacement,.....

Most likely path for the water, is right down the carb,....

 

[dan2744]

Thanks Bondo, this one is turning over now, I just put some mystery oil down the cylinders, maybe I will get lucky. Is it easy to tell between the I pc. or 2 pc rear main seal?

 

[dan2744]

i think this vid is what you were talking about Bondo.
https://www.youtube.com/watch?v=FDBYL-HvGFI

 

[Bondo]

Ayuh,.... that's right, the crankshaft bolt pattern is different, so the flywheel, 'n possibly the coupler are also,....

 

[dan2744]

Have you ever heard of Tiara making a 20 foot speed boat?

 

[Bondo]

Have you ever heard of Tiara making a 20 foot speed boat?

Nope,...... A boats a boat,........ Unless it's My boat,.....

 

[Scott Danforth]

Its a 32 year old boat. No mater who made it 32 years ago matters less than its care and maintenance over the past 3 decades.

Especially considering it was built with a 15 year design life