Go Back   Trawler Forum > Maintenance and Systems > Power Systems

Thread Tools Display Modes
Old 09-02-2016, 09:47 AM   #1
City: Lake Charles
Country: USA
Join Date: Aug 2015
Posts: 17
Yanmar 315 leaking water pump

I have a 2004 Mainship Pilot 30 II with the 315 Yanmar. I noticed raw water dripping from the vents on the side of the water pump after shutting the engine down. It does not seem to drip when the engine is running. So far it's running in the normal temp range.
Do I need to rebuild the pump and change the seals? Can I do this without any special tools to pull the seals? I see there is a repair kit available.

altouchet is offline   Reply With Quote
Old 09-02-2016, 10:30 AM   #2
djmarchand's Avatar
City: Essex, Ct
Country: USA
Vessel Name: Bella
Vessel Model: Mainship Pilot 34
Join Date: Aug 2012
Posts: 1,996
Yes, the pump seals are leaking. Don't delay in fixing it as raw water leaking out the seals can sometimes migrate back into the engine.

I would replace both the bearing and seals. It takes a bearing press to get them out and back in. Some auto parts shops have a press that you can use (but I am remembering from 40 years ago, so maybe not today).


djmarchand is offline   Reply With Quote
Old 09-02-2016, 12:21 PM   #3
Senior Member
drb1025's Avatar
City: Bellevue, WA
Country: USA
Vessel Name: Vamos a Ver
Vessel Model: DeFever 46
Join Date: Oct 2012
Posts: 363
Some snap ring pliers may be needed to remove the snap ring that holds in the seal.
drb1025 is offline   Reply With Quote
Old 09-02-2016, 05:12 PM   #4
Senior Member
City: Between Oregon and Alaska
Country: US
Vessel Name: Charlie Harper
Vessel Model: Wheeler Shipyard 83'
Join Date: Jun 2016
Posts: 158
Most better auto parts stores have bearing presses, but you can do it with either an arbor press (at most cheap tool stores), or a bearing driver. Bearing driver is a set of tools with a punch and tooling that fits most bearings and seals.
Attached Thumbnails
Click image for larger version

Name:	bearing driver.jpg
Views:	10
Size:	118.9 KB
ID:	55944   Click image for larger version

Name:	arbor press.jpg
Views:	12
Size:	175.8 KB
ID:	55945  
Lepke is online now   Reply With Quote

Thread Tools
Display Modes

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

All times are GMT -5. The time now is 03:28 PM.

Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2016, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2006 - 2012