Cruisers Forum

  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on Cruisers Forums. Advertise Here
Thread Tools Search this Thread Rate Thread Display Modes
Old 15-03-2016, 19:02   #1
Registered User

Join Date: May 2008
Location: Port Townsend, WA
Boat: 37' Samson, Ferro
Posts: 69
Images: 9
Increase Prop Size?

I have a 10HP Sabb diesel with the standard 2 blade 17" variable pitch prop that is manufactured by Sabb for the engine.

I wish to repower with an 18 hp Sabb with the same clutch for the variable pitch shaft/prop. (Same footprint and shaft connection.)

My question: In order to increase power and speed of the boat to match the power increase of the engine, would I need to increase the prop size?

My quandary: In order to increase the propeller size I would need to cut a larger space in my rudder/hull to make it fit. If I go with a 3 blade then I need to look at different F/R gear box and drive shaft.
Borealis is offline   Reply With Quote
Old 15-03-2016, 19:17   #2
Registered User
Cheechako's Avatar

Join Date: Aug 2006
Location: Skagit City, WA
Posts: 23,916
Re: Increase Prop Size?

No, usually your diameter is limited to 15% of the diameter clearance from the hull anyway. With the vari pitch and more HP you will likely end up fine.
"I spent most of my money on Booze, Broads and Boats. The rest I wasted" - Elmore Leonard

Cheechako is online now   Reply With Quote


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Prop walk depending on prop size? phipseml Propellers & Drive Systems 17 20-04-2015 07:06
Increase Propeller size? Downhill Propellers & Drive Systems 17 05-02-2014 01:21
Increase size of PM folder Stillraining Forum Tech Support & Site Help 2 12-12-2008 13:53
Increase the clarity of some photo? Default Forum Tech Support & Site Help 1 19-03-2006 08:34

Advertise Here

All times are GMT -7. The time now is 13:53.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2021, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2021, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.