Register free!
Search
 
     

The Green Industry's Resource Center


Click for Weather
Reply
 
Thread Tools Display Modes
  #11  
Old 05-20-2010, 04:54 PM
piston slapper's Avatar
piston slapper piston slapper is offline
LawnSite Platinum Member
 
Join Date: Mar 2010
Location: Tampa Fl
Posts: 4,025
Mechanics, like doctors and lawyers and accountants , all think they're right.

Has the rope snatched out of your mechanics hand? If your mechanic is as good as you think he is, Im sure he checked the valve adjustments. It doesn't take long to call roll.....there are only so many things that cause an engine to kick back. The ACR may operate when slowly turning the engine, but its not working when you yank it.

Change the cam...that dog will bite you.
Reply With Quote
  #12  
Old 05-20-2010, 05:21 PM
rob7233's Avatar
rob7233 rob7233 is offline
LawnSite Senior Member
 
Join Date: Feb 2005
Location: 9b Central FL
Posts: 778
Okay, I'm buying. Yeah, I'm stubborn. But I have found a time too many (and to my benefit), that conventional wisdom is almost always wrong..

No, it hasn't torned out of this mechanic's hand but it has in another's.

Yes, valve adjustment is spot on.

You said there are so many reasons for an engine to kick back....

Would you list them? - And do those reasons include causes for engines w/o an ACR?

Thanks for your response!
Reply With Quote
  #13  
Old 05-20-2010, 05:55 PM
Restrorob's Avatar
Restrorob Restrorob is offline
LawnSite Fanatic
 
Join Date: Apr 2005
Location: Show'n my truck off !
Posts: 10,690
Quote:
Originally Posted by rob7233 View Post
I have found a time too many (and to my benefit), that conventional wisdom is almost always wrong..

Rob Rob Rob...... I don't know how long piston slapper has been spinnin wrenches but I've been at it over 30 yrs dude......

Sounds to me you have a bunch of idiots working on your unit, Last I heard there's no one on earth that has X-ray vision. So how tha he11 can they KNOW the ACR is working properly under ALL cranking speeds ???

If they have done all you have posted, REPLACE the dam cam and be done with it !!!

Better yet, Load it up and drive 155.43 miles NW and I'll fix the thing....

OR, Take Kawi's advise and "PULL HARDER" !!!
__________________
Quote:
Originally Posted by piston slapper View Post
You never learn anything until you admit you don't know it all...

"Why go out preserved when you can go out beat up, worn out, sliding in sideways screaming, Holy Sh!t What A Ride" !!!
Reply With Quote
  #14  
Old 05-20-2010, 05:58 PM
mikes landscaping's Avatar
mikes landscaping mikes landscaping is offline
LawnSite Senior Member
 
Join Date: Jul 2006
Location: kansas
Posts: 298
I have the same engine one a ferris wb and it does that. I haven't even bothered to fix it
Posted via Mobile Device
Reply With Quote
  #15  
Old 05-20-2010, 06:07 PM
carlriv's Avatar
carlriv carlriv is offline
LawnSite Member
 
Join Date: Dec 2001
Location: Mass
Posts: 99
Whats a cam replacement cost on a 14 year old engine??? $300 - $400?? Whats a new engine cost? $700 and get quite a few years of trouble free service.... How about stitches, pulled tendons or a broken bone?
Reply With Quote
  #16  
Old 05-20-2010, 06:19 PM
Restrorob's Avatar
Restrorob Restrorob is offline
LawnSite Fanatic
 
Join Date: Apr 2005
Location: Show'n my truck off !
Posts: 10,690
Quote:
Originally Posted by carlriv View Post
Whats a cam replacement cost on a 14 year old engine???

Round $250 parts and labor......

New engine $800 +
__________________
Quote:
Originally Posted by piston slapper View Post
You never learn anything until you admit you don't know it all...

"Why go out preserved when you can go out beat up, worn out, sliding in sideways screaming, Holy Sh!t What A Ride" !!!
Reply With Quote
  #17  
Old 05-20-2010, 08:20 PM
ricky86 ricky86 is offline
LawnSite Bronze Member
 
Join Date: Aug 2008
Location: Monmouth Cty N.J.
Posts: 1,252
Try tightening the valve clearance. Make sure there is some clearance and pull it slow at first, to make sure there are no interference problems That will open the valve more during starting. If it helps, it's got to be the ACR. Take all parasitic loads off the engine also during testing.
Reply With Quote
  #18  
Old 05-21-2010, 09:26 AM
piston slapper's Avatar
piston slapper piston slapper is offline
LawnSite Platinum Member
 
Join Date: Mar 2010
Location: Tampa Fl
Posts: 4,025
Rob7233 ....Here,s how it works...one more time...without the muzzle or the dog...

Check the valves and the ACR bump during compression stroke
Pull the rope ...if it kicksback ...check the flywheel key
If it still kicksback, disconnect the sparkplug wire...pull rope again
Now you have eliminated any flywheel or ignition issues..
If it still kickback, your problem is internal ...
Either the ACR isnt working properly...
The cam is 1 tooth off..either from the factory or it jumped time..
On this engine,the crank gear also has a halfmoon key that might be damaged

When you remove the engine sump check the timing before you remove the cam.

Its cheaper to muzzle the dog (fix the problem)
Than to pay for the bite(damaging your arm or hand)
I hope thats not too cryptic.....
Reply With Quote
  #19  
Old 05-21-2010, 03:25 PM
rob7233's Avatar
rob7233 rob7233 is offline
LawnSite Senior Member
 
Join Date: Feb 2005
Location: 9b Central FL
Posts: 778
Thanks for all the replies and input.

This engine doesn't kick back all the time but just once in a while (maybe on the compression stroke?).

The piece(s) of info I was looking for was:

" - If exhaust valve does not open more than 0.06mm (0.024in) briefly just after intake valve closes, ACR mechanism on camshaft is faulty."

If the highest compression reading is less than 71psi, I'll need to trouble shoot the engine.
Reply With Quote
  #20  
Old 05-22-2010, 09:33 AM
piston slapper's Avatar
piston slapper piston slapper is offline
LawnSite Platinum Member
 
Join Date: Mar 2010
Location: Tampa Fl
Posts: 4,025
Change the cam before someboby else gets hurt.


THERE IS A FOREST BEHIND THOSE TREES
Reply With Quote
Reply

Tags
14hp , engine , fc420v , kawasaki , recoil

Thread Tools
Display Modes

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





Powered by vBulletin® Version 3.8.6
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Copyright ©1998 - 2012, LawnSite.comô - Moose River Media
All times are GMT -4. The time now is 07:04 PM.

Page generated in 0.10249 seconds with 9 queries