Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 30-06-2013, 11:19   #1
Registered User
 
brutb's Avatar

Join Date: Feb 2011
Location: Cocoa, FL
Boat: Wittholz 39' Cutter by Kanter, CSY 37 Cutter
Posts: 598
Images: 4
What Pitch Prop

I have an older AB lite 9 plus RIB with a 2005 Johnson 9.9hp 2 stroke. It has a 9 1/4"dia x 8" pitch prop in worn out condition. What would you recommend for the pitch? Rib weighs about 100 lbs, motor 75 lbs, me about 200 lbs, gf lite at 120. At this time the boat plans well with the 2 of us and probably goes about 15mph. Is this close to what others are getting? Again what pitch would yo recommend?
__________________

__________________
brutb is offline   Reply With Quote
Old 30-06-2013, 11:24   #2
Registered User
 
deckofficer's Avatar

Join Date: Feb 2011
Location: Northern and Southern California
Boat: too many
Posts: 4,198
Images: 4
Re: What Pitch Prop

Without knowing the rpm at full throttle it would be hard to guess a pitch change.
__________________

__________________
Bob
USCG Unlimited Tonnage Open Ocean (CMA)
http://tbuckets.lefora.com/
deckofficer is offline   Reply With Quote
Old 30-06-2013, 18:40   #3
Registered User
 
brutb's Avatar

Join Date: Feb 2011
Location: Cocoa, FL
Boat: Wittholz 39' Cutter by Kanter, CSY 37 Cutter
Posts: 598
Images: 4
Re: What Pitch Prop

Unfortunately the Johnson does not have a tach. I would guess by sound it is in the 5000rpm range. From one motor head to another.
__________________
brutb is offline   Reply With Quote
Old 30-06-2013, 19:03   #4
Registered User
 
deckofficer's Avatar

Join Date: Feb 2011
Location: Northern and Southern California
Boat: too many
Posts: 4,198
Images: 4
Re: What Pitch Prop

I know that, no tach that is. So we are both motorheads? I'll tell you about mine if you tell me about yours.

As to your prop, you can use a handheld tach pointed at your flywheel, otherwise how quick is it out of the hole? If it cranks right up to plane, and doesn't sound like it is screaming at 6000+ rpm, you probably have the correct pitch now.
__________________
Bob
USCG Unlimited Tonnage Open Ocean (CMA)
http://tbuckets.lefora.com/
deckofficer is offline   Reply With Quote
Old 06-07-2013, 17:47   #5
Registered User
 
brutb's Avatar

Join Date: Feb 2011
Location: Cocoa, FL
Boat: Wittholz 39' Cutter by Kanter, CSY 37 Cutter
Posts: 598
Images: 4
Re: What Pitch Prop

DO, last rod was a 41 Chevy 2dr sedan with Mustang 2 front end, 9" ford RE with 3.25 gears sitting on S-10 rear springs with urethane bushings. I did a frame off. Disc ft and rear with power brakes. Dechromed and painted a dark Lexus green metallic with dove grey interior. Veed the front windshield and all the normal rodding stuff. Sold it and went back to building a RV-8 kit plane, sold it after motorcycle accident and am now the owner of not one but two sailboats......talk about a death wish. Still trying to get one ready to the Gulf this fall....... Love your Track T, that was my next street rod using a Ford t-Bird 2.4 4cyclinder with the factory turbo and a 5 speed. Light and easy to handle...
__________________
brutb is offline   Reply With Quote
Reply

Tags
pitch

Thread Tools
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




Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 22:11.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.