Cruisers Forum

Join CruisersForum Today

Thread Tools Rate Thread Display Modes
Old 26-05-2013, 15:52   #1
Registered User

Join Date: May 2012
Location: Mandeville, LA
Boat: Hunter 30
Posts: 5
Impeller Replacement

I have a 30' Hunter sailboat with a 1980 Yanmar diesel engine. The impeller just gave out yesterday. Would anyone know if it's a DIY job, or should I look for a marine engine repair shop? Any thoughts would be appreciated. Thanks. Bill

BillPaul is offline   Reply With Quote
Old 26-05-2013, 16:01   #2
Registered User
Dhillen's Avatar

Join Date: Oct 2011
Location: South Pacific
Boat: Oyster 53
Posts: 359
Re: Impeller Replacement


This is easily done and it should be part of your annual maintenance routine - as I am sure now it will become. All you need to do is gently remove the face plate to the water pump">raw water pump on the engine and then gently remove the impeller. I find the bent needle nose pliers (the ones with the 90 degree bend) to be the easiest for the job. Don't worry about thrashing the impeller pulling it out as you will replace it with a new one. Be sure you don't score the inside of the pump, either.

Examine the impeller. Likely as not judging from your question it won't all be there. Some of it has broken off and lodged itself in your heat exchanger. You may have to pull that off and clean out all the rubber bits. I have in the past found impeller bits lodged in the 90 elbow coming out of the pump that never, fortunately, made it to the heat exchanger.

I use a little vaseline on the new impeller to get it rotated into the pump. It does not matter which way you bend the blades (despite what you may hear) as when you first start the engine it will spin it into the proper position.

The face plate may leak. This may because you forgot the gasket. Some pumps have them (usually made of paper) and some don't. Examine your faceplate carefully. If it does not have a gasket DON'T put one in. The gasket usually comes in the impeller package.

This is an easy job. Get used to doing it and you will feel some satisfaction in an ever deeper relationship with your engine.



Dhillen is offline   Reply With Quote
Old 26-05-2013, 16:12   #3
Registered User
Rhapsody-NS27's Avatar

Join Date: Oct 2010
Location: VA, boat: Deale, MD
Boat: 1981 Nor'sea 27
Posts: 1,339
Re: Impeller Replacement

Do what Dhillen said.

I replaced mine recently. It really wasn't too hard to do.
Daniel - Rhapsody Blog,
“A sailor’s joys are as simple as a child’s.” — Bernard Moitessier
"I don't need therapy, I just need my boat"
Rhapsody-NS27 is offline   Reply With Quote
Old 27-05-2013, 06:10   #4
Registered User

Join Date: May 2012
Location: Mandeville, LA
Boat: Hunter 30
Posts: 5
Re: Impeller Replacement

Thanks Dhillen. I'll give it a try. Bill
BillPaul is offline   Reply With Quote
Old 27-05-2013, 06:36   #5
carstenb's Avatar

Cruisers Forum Supporter

Join Date: May 2012
Location: Copenhagen
Boat: Jeanneau Sun Fast 40.3
Posts: 4,576
Images: 1
Re: Impeller Replacement

A new impeller cost around 20 bucks. I change mine every spring. Job takes like 10 minutes when at the dock. Doing it at sea close to a lee shore in a gale is not an activity to be contemplated (do not ask me how I know this) with a restful mind.
I spent most of my money on Booze, Broads and Boats. The rest I wasted - Elmore Leonard
carstenb is offline   Reply With Quote
Old 27-05-2013, 06:43   #6
Registered User
S/V Alchemy's Avatar

Join Date: May 2008
Location: Toronto
Boat: Custom 41' Steel Pilothouse Cutter
Posts: 4,227
Re: Impeller Replacement

Bill, you are going to LOVE the "cable tie impeller vane" trick:

Read all about it: Tips On Regular Engine Checks And Installing New Impellers

Can't sleep? Read for fast relief. Can't read? Avoid, because it's just personal reviews of sea books.
S/V Alchemy is offline   Reply With Quote

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

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 16:49.

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.