Whaler Central - Boston Whaler Boat Information and Photos

Posted by motttocs on 03/15/21 - 12:58 PM

I just repowered my 1967 Nauset with a 2020 Yamaha F90 but I need a prop. I have a solid mahogany console and a mahogany RPS seat. Under the console I have two batteries and a custom 27 gal. stainless fuel tank. WOT for the Yamaha is 6000 rpm.

Posted by Phil T on 03/15/21 - 3:41 PM

16/17 owners with the F90 have done a fair bit of prop testing.

Their recommendations include:

13-1/3 x 18 Yamaha Performance Series
13 x 19 Yamaha Painted Stainless Steel
13 x 19 Powertech SCD

* Note size only applies to the make and model listed. Presumes the engine is mounted at least 2 holes up. Top bolt is in the 3rd hole down from top.

Expect a WOT of ~5800rpm's and 42-45mph running light and solo.

Posted by motttocs on 03/23/21 - 4:42 PM

would this be OK? Yamaha Talon SS Diameter: 13.125, Pitch: 18

Posted by Phil T on 03/23/21 - 5:09 PM

No. The sizes listed only apply to the make and model listed above.

The Talon has not been tested/recommended for this application.

Note - Props are very expensive. Dont' expect to get one cheap. That would be like getting a 95K Land Rover and installing tires from a Big Wheel child's toy.

Contact either -

Andy at Sim Yamaha for Yamaha props
www.simyamaha.com

Ken at Propgods for PowerTech
www.propgods.com

Edited by Phil T on 03/23/21 - 5:19 PM

Posted by motttocs on 03/24/21 - 4:18 AM

Thank you, I previously had an F150 but it came with the prop. New boat, engine and setup

Posted by reelescape1 on 03/25/21 - 4:08 PM

I have a 1988 17' Montauk with 2020 Yamaha F90. Ken at PropGods recommended the PT SCD3R17PVM90 and it's spot on. If you order through him he will swap until you're satisfied just cover shipping (and no damage).

Posted by motttocs on 03/25/21 - 5:07 PM

Thx, just ordered a 13x19 to try. Will scale down if needed.

Posted by motttocs on 03/26/21 - 9:00 AM

My boat guy took it out today with a 13 x 15 SS with one hole up. ran 5200 to 5300 with little trim available. No porpoising. Go two holes up with a 18 or 19 pitch? I have a 19 coming Monday to try

Posted by Phil T on 03/26/21 - 11:36 AM

You got two parallel threads. Stick to one and ditch the second.

Posted by Phil T on 03/26/21 - 11:44 AM

#10

Without a make/model, the size does not help.

Regardless, the prop size without make/model does not read to be a good choice.

Don't get distracted.

Props on the list, engine mounted 2 holes up. Test and report.

Posted by motttocs on 03/27/21 - 5:44 AM

#11

13 x 15 Turning point SS prop hit 52-5300 rpm Yamaha 6000WOT Going to try a Talon SS 13 1/8 x 14

Posted by Phil T on 03/27/21 - 9:59 AM

#12

Given you are not interested in taking prop advice from owners with the same boat and engine, I have nothing more to add.

Posted by motttocs on 03/27/21 - 1:14 PM

#13

Talon recommended by Andy from Sim yamaha. Guy you suggested!

Posted by Phil T on 03/27/21 - 1:35 PM

#14

Sorry, missed that. My apologies.

I am at a loss why he is recommending that prop model.

Does he not have any Performance Series or Painted Stainless in stock and they are backordered?

Posted by motttocs on 03/31/21 - 11:12 AM

#15

pretty much everything is backordered. I have to have my guy move the motor to the two up position from the one up first.