Transmission/Prop Selection
Moderators: BeaconMarineBob, Moderator, BeaconMarineDon
- The Dog House
- Active User
- Posts: 807
- Joined: Mon Jan 09, 2012 6:51 am
- Location: Bordentown, NJ
Transmission/Prop Selection
I was able to pick up a PV33R (2:1) Paragon V drive at a fairly good price. I have this in my garage as a backup in case something goes wrong with my current transmission/V drive (1:1 ratio). My original intention was to have the PV33R rebuilt with PV31 gears in the V drive to change the ratio to 1:1. I'm now wondering if I could increase the pitch on the propeller instead of changing the gears. I'm currently running a 15 x 11 propeller. If I use a 15 x 22 propeller with the PV33R, theoretically I should be moving the same amount of water. Is there any reason this won't work or is not a good idea?
1993 Sea Ray 200 Overnighter OB with 1993 Mercury 150 hp Outboard
1979 Starcraft 14' Rowboat with 2011 Mercury 9.9 hp Outboard
Former boat: 1971 Trojan F26
1979 Starcraft 14' Rowboat with 2011 Mercury 9.9 hp Outboard
Former boat: 1971 Trojan F26
- prowlersfish
- 2025 Gold Support
- Posts: 12725
- Joined: Sat Nov 05, 2005 6:56 pm
- Location: Lower Chesapeake Bay ,Va
Re: Transmission/Prop Selection
Good chance you will break a shaft . By going with a 2 to 1 from a1 to 1 you are doubling the torque to the shaft .
Boating is good for the soul
77/78 TROJAN F36 Conv.
6BTA Cummins diesels
Life is to short for a ugly boat
77/78 TROJAN F36 Conv.
6BTA Cummins diesels
Life is to short for a ugly boat

- The Dog House
- Active User
- Posts: 807
- Joined: Mon Jan 09, 2012 6:51 am
- Location: Bordentown, NJ
Re: Transmission/Prop Selection
Thanks Paul. I didn't think of this. Hopefully I'll never need to use it, but if I do I'll have it rebuilt with a 1:1 gear set.prowlersfish wrote:Good chance you will break a shaft . By going with a 2 to 1 from a1 to 1 you are doubling the torque to the shaft .
1993 Sea Ray 200 Overnighter OB with 1993 Mercury 150 hp Outboard
1979 Starcraft 14' Rowboat with 2011 Mercury 9.9 hp Outboard
Former boat: 1971 Trojan F26
1979 Starcraft 14' Rowboat with 2011 Mercury 9.9 hp Outboard
Former boat: 1971 Trojan F26