Yanmar 2QM15/primary fuel filter - SailNet Community
  • 1 Post By RichH
LinkBack Thread Tools
post #1 of 2 Old 06-04-2012 Thread Starter
Junior Member
Join Date: Jun 2011
Posts: 11
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
Yanmar 2QM15/primary fuel filter

so I just bought this boat. When i went to change fuel filters, oil, and filter i found there was not a primary/water seperator filter. the only filter is the secondary on the engine. the boat is a 78 model and has probally been this way for a while. do you think i shlould add one or since it isnt broke dont fix it?

rox33861 is offline  
Quote Quick Reply Share with Facebook
Sponsored Links
post #2 of 2 Old 06-04-2012
Senior Member
RichH's Avatar
Join Date: Jul 2000
Location: Pennsylvania
Posts: 4,331
Thanks: 41
Thanked 235 Times in 222 Posts
Rep Power: 18
Re: Yanmar 2QM15/primary fuel filter

The 2QM and 3QM engines were supplied with an engine mounted 'guard' filter at 15-17然 'nominal' retention 'rating'. The 'guard filter' is the teeny filter that is mounted ON the engine; the only purpose of the 'guard' is to protect the engine fuel pumps IF any upstream filter fails.
For 'best' protection, there should be a 10然 (Racor, etc. type) filter that precedes the engine guard. If your fuel tankage is notorious for historically releasing 'slugs' of debris or you get your fuel from 'notoriously' dirty fuel depots (ie.: marinas), then the 10然 should be preceded by a 30然 nominal rated Racor type filter.

Simple Speak: put a 10然 'upstream' of the engine mounted 15然, if the 10然 plugs rapidly then put a 30然 upstream of the 10然 and/or clean out the tank.

Tank ---> 30然 (optional) ---> 10然 ----> 15-17然 (engine 'guard') ---> engine.

jppp likes this.
RichH is offline  
Quote Quick Reply Share with Facebook

Quick Reply

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


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

Email Address:


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

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
Yanmar 3GMF primary fuel filter change dfsdghsdhsd Diesel 10 05-01-2016 09:45 PM
Primary fuel filter Jotun Gear & Maintenance 30 12-19-2010 02:01 PM
Clogged Primary fuel filter. L124C Diesel 12 12-19-2010 12:42 PM
Yanmar 3GM30F Primary fuel filter thaeni Diesel 3 08-10-2010 12:00 PM
Yanmar 2QM15 - Changing the Fuel Filter backcreeksailor Gear & Maintenance 15 06-04-2009 07:36 PM

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