correct props for 1988 sailfish 255 w/ 200 hp yamaha HPDIs ?

[mtkfs]

I was wondering if anyone can tell me what the correct propeller diameter and pitch would be for a 1988 Sailfish 255 with twin Yamaha 200hp HPDIs.
Someone out there must have some experience with this setup. I would prefer to avoid the trial and error method as life seems to have enough trials and I've already made plenty of error.
Help is greatly appreciated.[/b]

 

[amr72]

15 1/4 diameter 17" pitch...I am speeking from experience this should get you to about 5500 rpms at WOT.

 

[mtkfs]

Thanks for the reply. Is that what you are using with twin optimaxs?

 

[amr72]

I have 19" pitch mirage props right now and get get only 5000 rmps at WOT. I plan on swaping them out for 17" in the future. Too many things on the list for this season already. On my previous rig I had a single 200 hpdi and went from 19 to 17 and gained about 400 rpms and had much improved performance all around. Lost about 1 mph off the top but who cares...

 

[HaleNalu]

I repowered by 1992 252 G with Yam 200 HPDI's. Yamaha SS II 17" props turned 5500-5600 RPM in salt water with full bottom paint, full load of fuel.

With full load of 5 people, full fuel, 250# ice and full gear it would still turn 5300-5400 RPM's. The original 200's were also 17's.

 

[mtkfs]

Thanks HaleNalu. Do you know what speed at cruise and WOT and what kind of fuel burn you get? Looks like we are trending toward 17" pitch .

 

[jellyfish]

I had the M17's on my twin HPDI Yamaha 200 And they were great. Topped out at 5800 smooth and fast!

 

[twinyams265]

I had a 265 with 200 hpdi's, similar hull as far as weight/beam goes. I ran 15 1/4 x 17's and turned 5800 rpm trimmed out with a good load and the boat ran mint. I believe i used to get about 1.7 mpg in the bay and about 1.5 mpg running offshore.

 

[BobP]

19s may get you more speed on the lighter pre 1990 hulls, I have 17s since it's all about hole shot for me, boils the water right up with the 12 pistons kicking 400 ponnies into a frenzy on hammer drop.

Is it spring yet?

 

[jellyfish]

15 1/4 diameter 17" pitch...I am speeking from experience this should get you to about 5500 rpms at WOT.

Yep thats what I had on my HPDI 200 and she ran great.