Notices
The Boating Forum

09' 496 merc HO fuel issue

Old 05-27-2016, 07:58 PM
  #1  
Admirals Club Admiral's Club Member
Thread Starter
 
Join Date: Jul 2015
Location: Massachusetts
Posts: 186
Likes: 0
Received 3 Likes on 3 Posts
Default 09' 496 merc HO fuel issue

Hello,

On my last leg with this issue. I recently purchase an albemarle 265 express with a 496 mercruiser HO with Bravo III.

My first run with it about 10 minutes into 4200rpm the engine alarm sounded and merc went into guardian mode. Did this a few times. It has 2 gas tanks. Runs off one water separator.

Finally isolated the tanks. Runs perfect on the starboard tank no alarms or any power issues. When I turn the starboard tank off and switch to the port the engine goes into hairdo an mode. (Brings engine Down to a "limp mode"). I can turn the boat off and take off again but eventually alarm sounds.

Currently I have :
Changed anti siphon
Changed fuel line
Pulled and inspected pick up tube (no issues)
Checked vent by blowing into from transom. (No blocking)
Cleaned most fittings.

I'm at a loss of things to check that would cause this issue.

Any ideas would be greatly appreciated
Old 07-08-2016, 08:12 AM
  #2  
Admirals Club Admiral's Club Member
Thread Starter
 
Join Date: Jul 2015
Location: Massachusetts
Posts: 186
Likes: 0
Received 3 Likes on 3 Posts
Default

UPDATE:

After everything it turned out to be the cool fuel module and water pump(along with sensor)

Just a coincidence about the tanks.

after replacing these there is a night and day difference on performance.

Thanks for everyones input

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 On
Refbacks are Off


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information -

Copyright © 2018 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.