Cruisers Forum

Join CruisersForum Today

Thread Tools Rate Thread Display Modes
Old 17-04-2007, 09:43   #1
Senior Cruiser
schoonerdog's Avatar

Cruisers Forum Supporter

Join Date: May 2004
Location: annapolis
Boat: st francis 44 mk II catamaran
Posts: 1,171
Images: 4
sail drive raw water strainers

I have a boat with two yanmar saildrives. I pulled off the raw water heat exchanger manifold last year and found that small bits of plastic bags had been suck up the small inlets and then balloned out in the manifold, along with bits of old impellers and barnacles. Most of the manifold intakes were covered and this was the problem of hoses blowing off because of back pressure, engines overheating, and the muffler burning through. I heard though that Yanmar does not recommend raw water strainers on diesels with sail drives. Was wondering if then I should substitute taking off the manifold once a year (I assume the manifold had never been cleaned before for a 7 year old boat) and cleaning it or putting on raw water filters. My engine compartment is cramped as is.

Any diesel mechanics out there know if its true that SDs really don't need a raw water strainer? Finally, the mechanic really took off the manifold and checked it. Anything I should watch out for when I do this myself?
schoonerdog is offline   Reply With Quote
Old 17-04-2007, 10:03   #2
Senior Cruiser
delmarrey's Avatar

Cruisers Forum Supporter

Join Date: Mar 2003
Location: Somewhere along the US West Coast
Boat: Modified Choate 40
Posts: 10,469
Images: 122
Now that you have found all this stuff in your heat exchanger I'd recommend installing strainers anyway, wheather or not they're recommended. If they're down to the 4 oz. size they could be mounted most anywhere and EZ'ly checked and cleaned.

I check my strainer every morning when out gunkholing and usually have to empty it every other day. Mostly seagrass and small fishes in my area.

You must do a lot of motoring in Port areas. But I am surprised that you got so much stuff with saildrives. You must pick this stuff up in a dirty marina somewhere. The inlet's are well below the waterline, which is where most off the trash comes from.
delmarrey is offline   Reply With Quote
Old 17-04-2007, 10:25   #3
CF Adviser
Moderator Emeritus
TaoJones's Avatar

Cruisers Forum Supporter

Join Date: Dec 2006
Location: Montrose, Colorado
Posts: 9,850
Schoonerdog, this is from another thread . . .

Originally Posted by Sunspot Baby
I have Volvo sail drives and had frequent over heating problems. I installed new through hulls with sea strainers and quit trying to get cooling water through the sail drive. All my problems went away.

FWIW, I'm told that the sail drive is exactly the same unit as used by Yanmar so this is probably not just a Volvo issue.

. . . I kept it in mind for myself, because it seems so logical. Perhaps this could apply to your situation. If you would like to read the other thread, it can be found at: volvo saildrive

"Your vision becomes clear only when you look into your own heart. Who looks outside, dreams; who looks within, awakens."
Carl Gustav Jung (1875-1961)
TaoJones is offline   Reply With Quote

raw water, saildrive

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
Jabsco Raw Water Pump ... I'm stumped! KaptainKen Engines and Propulsion Systems 5 12-04-2007 00:19
I need advice for a first purchase MrShankmmz Monohull Sailboats 34 16-03-2007 19:39
Increasing Sail Plan and / or efficiency - Ideas? David_Old_Jersey Construction, Maintenance & Refit 15 26-11-2006 12:13
Genoa Cars timjf Deck hardware: Rigging, Sails & Hoisting 9 03-09-2006 15:27
Sail Drive CaptJason Engines and Propulsion Systems 3 12-06-2003 09:23

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 05:31.

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.