Starting issues Mercruiser 2008 4.3L - Stripers247.com Forums
 
Striped Bass Fishing Site Map | Contact Us | Fishing Log Software | Fishing Online | Advertise
to UPLOAD: please register or login

Go Back   Stripers247.com Forums > MAIN FORUM DISCUSSION > Boaters Forum > Boat repair issues & Shop Maintenance
Forgot Password? Register Now!!

Boat repair issues & Shop Maintenance Tips and discussion on Boat parts/boat maintenance.


Reply
 
Thread Tools
  #1  
Old 05-22-2016, 09:17 PM
KayakStripers's Avatar
KayakStripers KayakStripers is offline
Striper Hunter
 
Join Date: May 2015
Location: Valley Cottage, NY
Posts: 50
Default Starting issues Mercruiser 2008 4.3L

Hello,

I have a 2008 4.3L Mercruiser in a Maxum 1800. The past 3-4 years we have been having trouble with either the boat having a lot of difficulty starting up, and then occasionally, dying when slowing to idle. Both instances it takes about 45-60 seconds of cranking before the engine will turn over. Sometimes I am about to give up and then try it one last time and it will start up and run fine for the rest of the day.

I'm wondering if anyone is familiar with this engine? Where is the best place to start? My intuition is thinking to start with these:
  • Battery: check if there is enough CCA (though it's a 2014)
  • Carbuerator: needs to be cleaned? I don't believe it has been cleaned, we just winterize it each year.
  • Gas: We don't add stabilizer except over the winter, and it is usually ethanol 10%. I just bought 32oz of sta-bil marine. It is harder to start with older gas, but we have problems after recent fill-up's too.
Anyone have any tips?

Thanks in advance.
Ian
Reply With Quote
Sponsored Links
Advertisement
 
  #2  
Old 05-23-2016, 07:05 AM
TFKiv's Avatar
TFKiv TFKiv is offline
First Mate
 
Join Date: May 2012
Location: Cape, Maine
Posts: 263
Default Re: Starting issues Mercruiser 2008 4.3L

Yeah, they're pretty notorious for leaky/dirty carbs doing this. Also more of a long shot, but maybe worth a check...the main line electrical cannon plug connector that sits on top of the engine behind the carb can get corroded on the inside. when the engine bay is cold the rubber outer shell of the connector can shrink just enough to let current through(connection made) and after it gets warmed up it can expand just enough to stop the current (break connection) so you get no juice to the starter solenoid. Clean the connection... a little dielectric grease...
Reply With Quote
  #3  
Old 05-23-2016, 09:12 PM
KayakStripers's Avatar
KayakStripers KayakStripers is offline
Striper Hunter
 
Join Date: May 2015
Location: Valley Cottage, NY
Posts: 50
Default Re: Starting issues Mercruiser 2008 4.3L

Thanks. I will take a look at the cannon plug too.

Based on the symptoms it seems likely there could be a plugged pilot jet so it is having trouble to pull in gas when starting or idling. I might try sitting some seafoam in the float chamber and seeing if it will clean out the jets a little. Worse case I might send the carb out at the end of the season for a rebuild.
Reply With Quote
Sponsored Links
Advertisement
 
  #4  
Old 05-24-2016, 07:03 AM
Roccus's Avatar
Roccus Roccus is offline
King of Eels
Pro Staff
 
Join Date: Feb 2005
Location: Reading, Mass/Rings Island
Posts: 4,227
Default Re: Starting issues Mercruiser 2008 4.3L

This sounds purely like a fuel issue.... more specifically... a flooding issue... does the engine start good cold ?.... most likely a good carb cleaning is in order... Today's fuel has specific problems associated with it... when was the last time you changed the fuel filter? do you have a water separating fuel filter... you should.... clean the carb and check the float level... the addition of a new needle and seat would also be a good idea... Star tron is the best fuel additive out there... run it year round to help avoid fuel related problems.
__________________
.
Reply With Quote
  #5  
Old 05-24-2016, 10:17 AM
KayakStripers's Avatar
KayakStripers KayakStripers is offline
Striper Hunter
 
Join Date: May 2015
Location: Valley Cottage, NY
Posts: 50
Default

Hey Roccus. More recently the issues have been when starting cold. Then every 5-8 trips it sometimes stops when slowing to idle while running hot. If I have to replace any gaskets, needle, etc. I will probably just send out for rebuild at the end of the season.

I don't believe the fuel filter has been replaced. We have taken it to a marina for winterizing and maintenance, so I will check the log.
Reply With Quote
  #6  
Old 05-24-2016, 01:09 PM
TFKiv's Avatar
TFKiv TFKiv is offline
First Mate
 
Join Date: May 2012
Location: Cape, Maine
Posts: 263
Default Re: Starting issues Mercruiser 2008 4.3L

Yeah the wire was more of a hot issue. Does sound more carb related. Do you play with the throttle in neutral when having trouble starting it?
Reply With Quote
  #7  
Old 06-17-2016, 03:32 PM
Kappy Kappy is offline
Striper Hunter
 
Join Date: Feb 2014
Location: Milo, ME
Posts: 29
Default Re: Starting issues Mercruiser 2008 4.3L

Also make sure the tank vent is open and not allowing the fuel pump to create a negative vaccum in the tank. That will cause fuel starvation.
Reply With Quote
Reply

Bookmarks

Tags
2008, 43l, issues, mercruiser, starting

Thread Tools

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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Fishermens flea Market and Event Schedule New England 2008 Striperjim Seminars / Expos / Tourneys 2 02-28-2008 03:44 AM
February 2008 Fight card Striperjim The Sports Bar 0 02-08-2008 11:00 PM
Fishermens Flea Market Schedule and Info Mid Atlantic Coast NY NJ VA Pa Md Striperjim Seminars / Expos / Tourneys 3 01-18-2008 02:19 AM


All times are GMT -4. The time now is 03:50 PM.


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Copyright 2004 - 2013 Stripers247.com LLC
Affiliated Sites:   Noreast.com   Allcoast.com    2coolfishing.com