Cruisers Forum

Join CruisersForum Today

Thread Tools Rate Thread Display Modes
Old 28-08-2014, 17:35   #1
Registered User

Join Date: Feb 2012
Boat: 25' Cruisers Rogue 2570
Posts: 7
Bravo one oil leak

Hello, I have a Cruisers Rogue 2570 with a 7.4L Merc and a bravo one drive, S/N 0D432903, and transom assy S/N 0D411245. I put my drive unit on about a month ago to get ready for a late season, and noticed the usual small amount of drive oil leakage from the check valve in the bell housing as I put the drive on. It seemed to stop. I then towed the boat from one location to my house, where it lives most of the time. (It still has not been in the water since I installed the drive unit this season). I went out to the boat a few days later and noticed a ton of blue gear oil all over the stern drive, and a puddle on the ground. The oil bottle is pretty much empty.

I just this week got around to pulling the drive unit off to check everything out. As far as I can tell, the o ring around the check valve assy on the bell housing seems intact and undamaged, and was in place when I pulled the drive. The seal cup on the check valve assy on the driveshaft housing seems fine, too. The oil seems to go as far up as just above the check valves on the mating surface between the driveshaft housing and the bell housing, so I assume it's coming from the valves. Where else could it have come from?

Anyway, I'm not too familiar with the setup here, and where the valves lead, etc. How do I figure out if one of the check valves is bad, and which one (driveshaft housing valve, or bell housing valve)? If one or both of them are leaking, wouldn't the o ring that goes around the valve on the bell housing trap any oil and stop it from leaking? Does that mean I just need to replace the o ring? Or should I replace the check valve? Which one? How do I test them? Has anyone ever seen one go bad? Should I replace all the o rings on the mating surface between the driveshaft housing and bell housing while I have the drive off?

Thanks for any help.
CruisersRogue is offline   Reply With Quote
Old 29-08-2014, 13:48   #2
Registered User
NoTies's Avatar

Join Date: Nov 2005
Location: Vanuatu
Boat: Whiting 29' extended "Nightcap"
Posts: 1,336
Images: 2
Re: Bravo one oil leak

Check to make sure the two surfaces were fully mated and touching each other and replace the O ring anyway as it may have a small cut that is only apparent when under compression.

Positively, socially deviant.
NoTies is offline   Reply With Quote

oil, oil leak

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

Similar Threads
Thread Thread Starter Forum Replies Last Post
Want To Buy: Looking for a Hobie Bravo Sail & Bob Float SWFLHobie Classifieds Archive 5 02-06-2013 07:38
Mercruiser Bravo 3 Problem! Suggestions?? Alondra Powered Boats 7 05-08-2008 17:22

Our Communities

Our communities encompass many different hobbies and interests, but each one is built on friendly, intelligent membership.

» More about our Communities

Automotive Communities

Our Automotive communities encompass many different makes and models. From U.S. domestics to European Saloons.

» More about our Automotive Communities

Marine Communities

Our Marine websites focus on Cruising and Sailing Vessels, including forums and the largest cruising Wiki project on the web today.

» More about our Marine Communities

Copyright 2002-2015 Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 23:40.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2016, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2016, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.