Thread: Yamaha Outboard Question

Yamaha has finally got the kinks worked out of the SHO four-stroke.. Followed one from Holiday to Engineers earlier this yr at no less than 65mph on a 21' boat

Originally Posted by Wannabe...

Only real difference thaws days is low end torque. Two equal boats propped to their peak, a 4 stole vs a dfi 2 stroke, all else being equal, the 2 stroke should plane quicker and top end should go slightly to the 2 stroke due to less weight and possibly due to rev limit being slightly higher on the 2 stroke.

That said, 4 stroke is only way to go, but the SHO is said to be a beast....then again, SHO oil is high high dolla. And it's a relatively new tech, so no serious track record to rely on.

If I were to empower today, it's be with a Yama 4 stroke 225 or possible 200 since I could careless about top end.

Wannabe...

What's this oil you speak of? The SHO is a four stroke.

Ahh, u right. I was thinking if the hpdi. Enjoy your rightness. May not happen again any time soon.

I heard when the SHO hit he market that the block could not be bored for new pistons due to the material used in the bores. That could be an expensive repair if the only option is a new block and pistons. Dunno if it's true though. May have been Merc fanboys that put that out there.

Truth be told, I haven't read of any-ANY problems with a SHO. Then again, I don't follow those boards like I used to.

Wannabe...

That's what I get for not keeping up. Seems a thrust washer bearing was and is a known problem and has caused many catastrophic failures. Some question as to whether its been corrected for 13 motors.

There is still some discussion on whether the block can be rebuilt as well there are new techs out there that have repaired them but safe to say its not common-translate cheap. One guy quoted 3400-4300 for a new block. Ouch

Wannabe...

I heard they went through eight versions before they got it right. Instead of repairing them they would just bolt you a new one on. I wanted one, but they don't come in a 25" shaft.

I have a 03 115hp four stroke Suzuki and I absolutely love it. Last year I almost did a little trading to get a second boat but backed away because the motor was a two stroke.


FISH ON