2GM20F Starting? - Page 2 - SailNet Community

   Search Sailnet:

 forums  store  


Quick Menu
Forums           
Articles          
Galleries        
Boat Reviews  
Classifieds     
Search SailNet 
Boat Search (new)

Shop the
SailNet Store
Anchor Locker
Boatbuilding & Repair
Charts
Clothing
Electrical
Electronics
Engine
Hatches and Portlights
Interior And Galley
Maintenance
Marine Electronics
Navigation
Other Items
Plumbing and Pumps
Rigging
Safety
Sailing Hardware
Trailer & Watersports
Clearance Items

Advertise Here






Go Back   SailNet Community > On Board > Gear & Maintenance
 Not a Member? 
  #11  
Old 07-03-2012
Junior Member
 
Join Date: May 2012
Location: Sydney,Australia
Posts: 9
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
hindsight is on a distinguished road
Re: 2GM20F Starting?

Try manually turning engine when cold & then hot if there is a noticable difference in lower compression when cold then remove the rocker cover (cold engine) & when each valve closes make sure the rocker arm is not hard on top of valve causing it not to seal creating loss of compression & that there is some slight play. If not adjust valve clearances & yes if this is the fault it will still start & run ok but will not rev as high.

Last edited by hindsight; 07-03-2012 at 03:11 AM.
Reply With Quote Share with Facebook
  #12  
Old 07-03-2012
Junior Member
 
Join Date: May 2012
Location: Sydney,Australia
Posts: 9
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
hindsight is on a distinguished road
Re: 2GM20F Starting?

If you find manually turning engine when cold is noticeably easier than after it,s been running then remove rocker cover & make sure that when each valve closes the rocker arm is not hard on top of valve therefore preventing it from fully sealing & causing loss of compression, if so then adjust valve clearances & yes it will still start & run ok with this fault but will not rev as high

Last edited by hindsight; 07-03-2012 at 03:33 AM.
Reply With Quote Share with Facebook
  #13  
Old 07-03-2012
TropicCat's Avatar
Senior Pirate
 
Join Date: Oct 2008
Location: Cape Canaveral, FL
Posts: 2,388
Thanks: 4
Thanked 12 Times in 12 Posts
Rep Power: 6
TropicCat is on a distinguished road
Re: 2GM20F Starting?

Although I agree that an air leak causes hard starting, it also makes for a rough running engine. .... So...This will make the third answer suggesting you adjust the valves. This is a real easy procedure, will only cost the price of a valve cover gasket and you'll be done in 10 minutes.
__________________
Tropic Cat

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Reply With Quote Share with Facebook
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

 
Posting Rules
You may post new threads
You may post replies
You may post attachments
You may edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Yanmar 2GM20F Suave Gear & Maintenance 2 05-16-2011 10:33 AM
yanmar 2GM20F oil burner seadog47 Diesel 11 10-16-2009 06:34 AM
2gm20F Fan Belts rjc9136quinn Diesel 9 10-08-2009 03:02 PM
Yanmar 2GM20F Petar Gear & Maintenance 13 10-02-2009 06:49 PM
pencil zincs on 2GM20F? bradfalk Gear & Maintenance 4 03-26-2009 03:23 AM


All times are GMT -4. The time now is 06:27 AM.

Add to My Yahoo!         
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
SEO by vBSEO 3.6.1
(c) Marine.com LLC 2000-2012

The SailNet.com store is owned and operated by a company independent of the SailNet.com forum. You are now leaving the SailNet forum. Click OK to continue or Cancel to return to the SailNet forum.