Twin 2-stroke performance on SeaPro

[Deleted]

Any idea what type of mpg's I can expect from 04 twin 150 yamaha ox66's on a 255cc? I've looked at the yamaha performance bulletins but they obviously dont have sea pro anymore. Is there a secret vault of older numbers?

Thanks

[Simple Man]

I searched around and didn't find much but I did find the following thread.
www.thehulltruth.com/boating-forum/5929-f150-6-gal-hr-150-hpdi-1-5-gal-1000rpm.html

Check out tarnolds' posts. Not the exact same setup but speed numbers should be close if not fuel burn. Maybe a member has the same setup and will chime in soon. Let us know what you come up with.

[T-Topless]

Yamaha doesn't keep their old service bulletins online, so they're hard to find (they used to have the 235cc results)

This 26 Sailfish with Twin 200 2-strokes is similar

www.yamaha-motor.com/assets/products/otb/bulletins/bulletin_2stroke_hpdi_sws_slf-2660cc-t-z200txrd.pdf

[Deleted]

Thanks guys. Good find on the hull truth. I don't expect 3.1 mpg but it gives hope of better than 1mpg!

[T-Topless]

Jan 19, 2012 11:52:17 GMT -6 Simple Man said:

I searched around and didn't find much but I did find the following thread.
www.thehulltruth.com/boating-forum/5929-f150-6-gal-hr-150-hpdi-1-5-gal-1000rpm.html

Check out tarnolds' posts. Not the exact same setup but speed numbers should be close if not fuel burn. Maybe a member has the same setup and will chime in soon. Let us know what you come up with.

Be careful with comparisons ...

tarnold's setup IS a SeaPro 255CC, but it had twin F150's = FOUR strokes (not OX66 2-strokes).

I do believe you will get 2.5-3mpg if you run them in the 3,800RPM range though ... but not in rough seas.

[Deleted]

Hey guys, I have a 255 cc with twin 200 suzuki EFI's Can anyone help me with fuel milage on these engines?? I'm looking to make 40-70 mile trips out and troll. Is this possible?? My tank holds 154 gallons.

[Deleted]

did you get any help, I have the same setup, my boat is a 1998. where are you located? I'm in Charleston

[Deleted]

No I have not received any help with it yet. I found one guy that had the same boat for sale, and he said he got 1.5 mpg at 30 knots. NOW I'm not sure about that??

[Deleted]

I live in savannah Ga. We r not that far apart.

[RunninLate]

SeaPro66, give me a call when you are heading out. I am also from Savannah. This coming weekend if the sea permit, I am heading out looking for some Cobia or maybe a w
ahoo. Again the seas have to be right.