Thread subject: Whaler Central - Boston Whaler Boat Information and Photos :: prop size
Posted by greenshoe on 09/05/08 - 3:22 PM
#1
I need help on what size propeller to choose for my 2008 Yamaha 90 HP. It is going to be mounted on a 1981 Montauk.
The boat will be used for fishing in and around Boston Harbor. No water skiing, two to three people with equipment, cooler in front with a couple beers, battery in console.
I would like the size for a stainless and aluminum propeller. I hope I gave enough information. This is a great site for getting information.
Edited by Tom W Clark on 09/05/08 - 10:19 PM
Posted by kamie on 09/05/08 - 4:53 PM
#2
Need more info, what prop is on there now? How fast and what are the RPM's at WOT?
Posted by John Fyke on 09/05/08 - 5:07 PM
#3
You need to talk to Tom Clark.
Edited by Tom W Clark on 09/05/08 - 10:21 PM
Posted by greenshoe on 09/05/08 - 5:34 PM
#4
kamie- motor being put on this this week just need some info about prop selection.
Posted by Tom W Clark on 09/05/08 - 5:38 PM
#5
WHICH 2008 Yamaha 90 HP outboard?
Posted by greenshoe on 09/05/08 - 6:57 PM
#6
Tom Clark -- It is a 2008 90 hp 4 stroke Yamaha.
Edited by Tom W Clark on 09/05/08 - 10:21 PM
Posted by Tom W Clark on 09/05/08 - 10:13 PM
#7
OK, well let's think about this. The 2008 Yamaha 90 HP four stroke has a 2.31:1 gear ratio, a 6000 RPM redline and uses a 4-1/4" diameter hub propeller.
Furthermore, we know from long experience that a classic Montauk with 90 HP is capable of 42-46 MPH, give or take.
This suggests that a propeller with about 19" of pitch is going to fit the bill. Looking at the readily available propeller models with the intermediate 4-1/4" hub we can make some recommendations based on what has been proven to work well.
If you want a Yamaha prop, try the 13" x 19" Painted Stainless Steel Prop or the 13-1/4" x 18" Performance 3 Series (essentially a Stiletto Advantage.)
Edited by Tom W Clark on 09/05/08 - 10:15 PM