Yanmar starting question - Page 3 - 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? 
  #21  
Old 04-19-2009
L124C's Avatar
Senior Member
 
Join Date: Oct 2007
Posts: 1,388
Thanks: 48
Thanked 3 Times in 3 Posts
Rep Power: 8
L124C is on a distinguished road
Another guy in my marina had this problem on a 2GM. His motor used to fire up immeadiatly, now it cranks for awhile. I asked if he put the throttle at 2/3 as my 2GM manual recomends. He never needed to move the throttle, the motor just fired up. He now puts the throtle at 2/3 and the motor fires faster.
Reply With Quote Quick reply to this message Share with Facebook
  #22  
Old 04-19-2009
Junior Member
 
Join Date: Aug 2007
Location: Vancouver,BC
Posts: 22
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
neilmcd is on a distinguished road
Air Leak

Quote:
Originally Posted by SteveInMD View Post
Well obviously people disagree on this one. I still believe you have a small air leak. Hence the extra cranking after the engine sits. Here's how to test the theory. After letting the engine sit, bleed the system before trying to start it. If it fires right up after bleeding it, you have an air leak. If there is no change and it still requires the extra cranking time, you don't.
I agree 100% with SteveInMD. I have recurring problems with a small air leak at the banjo joint on the low pressure side of the fuel supply system. The bolt holding the banjo joint in place tends to slacken slightly over time. As soon as this happens, a small air leak occurs and the engine then has to be turned over a lot more times before it will start quickly.

About twice a season I notice that the engine is not starting as normal. I then immediately tighten this bolt and the starting is normal again! Have though about using a thread locker solution but am reluctant to get this stuff anywhere near my fuel system!

I always keep the throttle wide open until the engine fires.

Last edited by neilmcd; 04-19-2009 at 02:16 PM.
Reply With Quote Quick reply to this message Share with Facebook
  #23  
Old 04-19-2009
Senior Member
 
Join Date: May 2007
Posts: 551
Thanks: 3
Thanked 3 Times in 3 Posts
Rep Power: 8
SteveInMD is on a distinguished road
As SD mentioned above - keep some copper crush washers on hand. They should only be used (crushed) a few times when tightening banjo bolts and vent screws. After that they will be the source of small leaks.
Reply With Quote Quick reply to this message Share with Facebook
  #24  
Old 04-19-2009
BarryL's Avatar
Senior Member
 
Join Date: Aug 2003
Location: Long Island, NY
Posts: 1,673
Thanks: 3
Thanked 32 Times in 29 Posts
Rep Power: 12
BarryL is on a distinguished road
Bad Lift Pump

Quote:
Originally Posted by SteveInMD View Post
The only way to lose the prime is if you have an air leak.
Couldn't a bad lift pump cause a lose of prime?

Barry
__________________
Barry Lenoble
Deep Blue C, 2002 C&C 110
Mt. Sinai, NY

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Reply With Quote Quick reply to this message Share with Facebook
  #25  
Old 04-19-2009
nk235's Avatar
Senior Member
 
Join Date: Apr 2007
Location: Long Island
Posts: 404
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 8
nk235 is on a distinguished road
SD - i like your point about the copper crush washers for the banjo bolts - to be honest I think I have over tightened that before - especially mid summer last year when I noticed a little fuel leaking out of there. I never knew you weren't suppossed to really tighten that.

Also I have checked the fuel lines and near the primary and secondary filters and have noticed no leaks. Also my primeing pump seems to work very well. I notice good clean bursts of fuel when I bleed the filter direclty on the engine so I don't think that is the problem.

My plan of action is later this week head down to the boat - bleed the system at the Racor (if I do in fact have a priming pump on there) then the secondary fuel filter, then the high pressure pump. I will then give it a go. From others I have been speaking with they seem to say that they often get the same problem early in the season with the cold weather. Hopefully it is just that but i'm still going to bleed it anyway.

Also thanks everyone for your advice and opinions. I'm only 25 and each year I learn more and more about the different systems, maintenance and repairs. I like doing everything myself so I get to know how to do it so if I ever do an extended cruise I'll be prepared. Hopefully in the future when I am a seasoned vet I'll be able to return all the favors by helping out all the other newbies with questions.
__________________
Morgan 323
Reply With Quote Quick reply to this message Share with Facebook
  #26  
Old 04-19-2009
Senior Member
 
Join Date: Jul 2008
Location: 34.25n 119.27w
Posts: 403
Thanks: 1
Thanked 4 Times in 3 Posts
Rep Power: 7
SJ34 is on a distinguished road
[/QUOTE]I like doing everything myself so I get to know how to do it so if I ever do an extended cruise I'll be prepared. Hopefully in the future when I am a seasoned vet I'll be able to return all the favors by helping out all the other newbies with questions.]

Good luck. With some care, a good manual and common sense, you will save yoursef lots of dough and gain invaluable experience. You may not have a pro mechanic close by the next time you have trouble, so learn what you can while there is no risk to life or vessel.
Reply With Quote Quick reply to this message Share with Facebook
  #27  
Old 04-19-2009
sailingdog's Avatar
Telstar 28
 
Join Date: Mar 2006
Location: New England
Posts: 43,290
Thanks: 0
Thanked 11 Times in 11 Posts
Rep Power: 13
sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice
Glad to help...I've noticed that people generally overlook the banjo bolt crush washers. Be aware that even if the banjo bolts don't leak fuel, they can leak air...

Quote:
Originally Posted by nk235 View Post
SD - i like your point about the copper crush washers for the banjo bolts - to be honest I think I have over tightened that before - especially mid summer last year when I noticed a little fuel leaking out of there. I never knew you weren't suppossed to really tighten that.

Also I have checked the fuel lines and near the primary and secondary filters and have noticed no leaks. Also my primeing pump seems to work very well. I notice good clean bursts of fuel when I bleed the filter direclty on the engine so I don't think that is the problem.

My plan of action is later this week head down to the boat - bleed the system at the Racor (if I do in fact have a priming pump on there) then the secondary fuel filter, then the high pressure pump. I will then give it a go. From others I have been speaking with they seem to say that they often get the same problem early in the season with the cold weather. Hopefully it is just that but i'm still going to bleed it anyway.

Also thanks everyone for your advice and opinions. I'm only 25 and each year I learn more and more about the different systems, maintenance and repairs. I like doing everything myself so I get to know how to do it so if I ever do an extended cruise I'll be prepared. Hopefully in the future when I am a seasoned vet I'll be able to return all the favors by helping out all the other newbies with questions.
__________________
Sailingdog

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

Telstar 28
New England

You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.

—Cpt. Mal Reynolds, Serenity (edited)

If you're new to the Sailnet Forums... please read this
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
.

Still—DON'T READ THAT POST AGAIN.
Reply With Quote Quick reply to this message Share with Facebook
  #28  
Old 04-19-2009
nk235's Avatar
Senior Member
 
Join Date: Apr 2007
Location: Long Island
Posts: 404
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 8
nk235 is on a distinguished road
Quote:
Originally Posted by sailingdog View Post
Glad to help...I've noticed that people generally overlook the banjo bolt crush washers. Be aware that even if the banjo bolts don't leak fuel, they can leak air...
True - I just ordered what I think are the crush washers from Torrenson marine but can I get these at any hardware store so long as I bring the one from boat with me or are these special for boats?
__________________
Morgan 323
Reply With Quote Quick reply to this message Share with Facebook
  #29  
Old 04-19-2009
sailingdog's Avatar
Telstar 28
 
Join Date: Mar 2006
Location: New England
Posts: 43,290
Thanks: 0
Thanked 11 Times in 11 Posts
Rep Power: 13
sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice
You can probably get them at any autoparts store...but I don't think the hardware store will have them.
__________________
Sailingdog

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

Telstar 28
New England

You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.

—Cpt. Mal Reynolds, Serenity (edited)

If you're new to the Sailnet Forums... please read this
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
.

Still—DON'T READ THAT POST AGAIN.
Reply With Quote Quick reply to this message Share with Facebook
  #30  
Old 04-19-2009
Senior Member
 
Join Date: May 2007
Posts: 551
Thanks: 3
Thanked 3 Times in 3 Posts
Rep Power: 8
SteveInMD is on a distinguished road
Quote:
Originally Posted by BarryL View Post
Couldn't a bad lift pump cause a lose of prime?

Barry
Yes, if it has a hole in the diaphragm. However, this too is an air leak.
Reply With Quote Quick reply to this message Share with Facebook
Reply

Quick Reply
Message:
Options

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:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

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

 
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
Need help YANMAR engine mount Giulietta Gear & Maintenance 20 04-15-2010 02:15 PM
Yanmar 4JH2E air filter element garyroot Gear & Maintenance 8 03-30-2010 09:23 PM
Starting Battery - Yanmar 3GM JohnRPollard Gear & Maintenance 14 03-11-2008 01:31 PM
Yanmar - fuel injection pump question rperret Gear & Maintenance 7 05-24-2007 11:00 AM
Yanmar 4JH air filter k1vsk Gear & Maintenance 19 12-25-2006 02:17 PM


All times are GMT -4. The time now is 03:25 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.