prop cavitaion issue -- need help - SailNet Community
 
LinkBack Thread Tools
post #1 of 2 Old 07-31-2009 Thread Starter
Senior Member
 
nightowle's Avatar
 
Join Date: Aug 2006
Posts: 226
Thanks: 1
Thanked 1 Time in 1 Post
Rep Power: 14
 
prop cavitaion issue -- need help

Today the prop consistently cavitated as I accelerated my boat just beyond 4.90 knots. I have a 1975 O'Day with an Atomic 4 engine. I do not have a tach set up to the engine yet, so I won't be able to tell you exact rpm's this is happening at. But I normally can do upwards of 6 knots. The boat had been recently hauled in May and the prop looked fine and has been performing very well since leaving in June for an extended cruise in the Gulf Islands of BC. New zincs were installed in May, as well. We dove the boat back at the dock today, and noticed no changes other than some minor algae (which we cleaned). The prop is on nice and tight, too. I read Mark Matthews post from 2002 here on cavitation re: leading edge damage and pitting. The leading edge of the prop looked fine, too.

Does anyone have any ideas?

Thanks in advance,

Brad

________
S/V Don't Panic!
O'Day 27
Seattle, WA

“Navigare necesse est, vivere non est necesse” To Sail is vital, to live is not.
nightowle is offline  
Sponsored Links
Advertisement
 
post #2 of 2 Old 07-31-2009
Grasshopper
 
JiffyLube's Avatar
 
Join Date: Jan 2008
Location: Oceanside, Ca.
Posts: 908
Thanks: 0
Thanked 2 Times in 2 Posts
Rep Power: 12
 
Quote:
Originally Posted by nightowle View Post
Today the prop consistently cavitated as I accelerated my boat just beyond 4.90 knots. I have a 1975 O'Day with an Atomic 4 engine. I do not have a tach set up to the engine yet, so I won't be able to tell you exact rpm's this is happening at. But I normally can do upwards of 6 knots. The boat had been recently hauled in May and the prop looked fine and has been performing very well since leaving in June for an extended cruise in the Gulf Islands of BC. New zincs were installed in May, as well. We dove the boat back at the dock today, and noticed no changes other than some minor algae (which we cleaned). The prop is on nice and tight, too. I read Mark Matthews post from 2002 here on cavitation re: leading edge damage and pitting. The leading edge of the prop looked fine, too.

Does anyone have any ideas?

Thanks in advance,

Brad
The problem could be before the prop. Check everything from the shaft to the motor mounts.
JiffyLube is offline  
Reply

Quick Reply
Message:
Options

By choosing to post the reply above you agree to the rules you agreed to when joining Sailnet.
Click Here to view those rules.

Register Now



In order to be able to post messages on the SailNet Community forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
Please note: After entering 3 characters a list of Usernames already in use will appear and the list will disappear once a valid Username is entered.


User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in











Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Forum Replies Last Post
need help with engine issue ndex68 Beneteau 9 01-25-2018 03:01 PM
Prop Shaft Seal issue please help DulceSuerna Gear & Maintenance 8 01-23-2011 05:57 AM
Need help diagnosing refrigerator issue poopdeckpappy Gear & Maintenance 16 04-30-2010 07:43 PM
Need help, please with tide/current issue FrankLanger Seamanship & Navigation 9 06-28-2006 06:23 PM
Need Help With Insurance Issue ian6460 Boat Review and Purchase Forum 3 09-06-2004 03:33 AM

Posting Rules  
You may post new threads
You may 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 On
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome