20SF w/2013 Yam 150F What Prop is best?
 

Greetings ... Just re-powered my 87 " Voyager" with a Yammy 150 4 stroke ... Voyager earns her living taking couples out to the many reefs around Islamorada Fl. Keys... came with a Reliance Series 14 1/2 17 which works pretty good .... but not getting all RPMs on top ...
Yamaha recommends a Reliance Series 13-3/4 x 19 For a Key West 20 which is about the same size and weight .....
Any Suggestions ?? Thanks!

Hi Capt. Bill this is rich10 l've asked the same question but haven't gotten the answer yet I'm gonna post again. What's your m.p.h. at top end?

Props
 

Billie,
Always make sure you can get to maximum RPMs under a full load. Back off on the pitch and diameter until you get there or you will burn extra fuel and wear things out prematurely starting at the lower unit and working it's way up through the wrist pins. Let 'em spool up to reach maximum RPMs and they will live happily ever after - overload 'em and they will sh*t the bed.
Just ask "Hollywood Prop" Gillie or Ken Reeves at "PropGods.com", they'er both real smart and will set you straight!

Thanks for the info Terry... and Rich for responding... I'm installing a "New" Yamaha Tach gauge to confirm the top RPM . It seems that with this prop the motor has to turn about 5-600 rpm faster to get the same speed as with the 200HPDI

Rich ... I used to get about 42-43 at 5500 with the HPDI 200 ... current tach has bleached to the point it is almost unreadable and will change out as mentioned asap

Full Trottle RPM
 

Changed the Tach and was able to get 40.7 mph (via GPS) @ 5800 !
So maybe the 17 14 1/2 Yamaha Reliance prop is Okay!

Thanks Capt Bill for your info this is helpful

What bimini top is on that 20'? Looks xtra HD!