Thread Tools Search this Thread
Old 17 June 2013, 13:28   #1
Country: UK - England
Town: Necastle
Make: Zodiac
Length: 5m +
Engine: outboard
Join Date: Feb 2012
Posts: 15
Dead Mariner 40 four stroke

The engine :- 2002 Mariner (Mercury) 40 EFI three cylinder four stroke.
The Problem :- Engine died whilst in use. It will fire very briefly when I try and start it but cut out almost immediately. It will only fire like this if you turn the key back to fully off and try again. If you just turn the key from the run position it will not fire at all. The plugs seem dry if I have been turning it over without it firing and I have checked all the fuel filters. I think given that it will fire but not run on the cold start there must be something wrong with the fuel injection system or ECU but if there is a sensor that might give these symptoms it would be handy to know....

Has anybody come across a fault like this before? I would like to get this boat running without spending a fortune at the dealers but cannot see anything obvious wrong with it....


TwoBob is offline   Reply With Quote
Old 17 June 2013, 16:07   #2
Country: UK - England
Town: Looe
Make: Delta
Length: 4m +
Engine: Mercury
Join Date: Apr 2004
Posts: 1,332
Sounds like a fuel pump problem. The fact that it will only start when you switch the key off and then on again will run the pump and let it start for a second. I would want to check the fuel pressure. Dont think it will be a ECU problem.
Black Dog Marine
Turbodiesel is offline   Reply With Quote

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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 -5. The time now is 19:40.

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