high compression

Reply

  #1  
Old 04-21-03, 07:55 PM
kmtischer
Visiting Guest
Posts: n/a
Unhappy high compression

I am working on a McColloch chainsaw. It is a Promac 440. I got it from my father since it had not been working for many years. The most immediate problem is The compression seems way to high to start. I can't even pull the start rope without lifting the saw off the ground. If I take out the plug, it spins over super easy. I stripped it down to the bare bones hoping to find something. No luck. Is there some compression release mechanism that isn't working? I even pulled off the head. Everything looked ok. Is the gap in the piston rings supposed to be in a certain position? Any help or advice would be greatly appreciated.
 
Sponsored Links
  #2  
Old 04-21-03, 08:06 PM
cheese's Avatar
Forum Topic Moderator
Join Date: Jul 2001
Location: USA
Posts: 16,819
I am not familiar with your saw offhand, but I don't believe it has a compression release. Some of these have a lot of compression, and are hard to start. Make sure the flywheel is not loose on the crankshaft, or out of round and hitting the coil legs.
 
  #3  
Old 04-22-03, 05:39 PM
kmtischer
Visiting Guest
Posts: n/a
Cheese
You were right. I guess high compression is normal with this saw. I put everything back together, cleaned the carb., replaced fuel lines, put fresh gas in with a good synthetic oil, and it started for me. What I did was pull the starter rope many times with the spark plug out to get the fuel worked through the lines, then reinstalled the plug and it fired up after a few pulls.
Sounds pretty good to me, only idles way to high. I will go thru the forum to find out how to adjust. Thanks for your help!! This is a great forum for the doityourselfer!!!!!!!!!
 
Reply

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 Off
Refbacks are Off


Thread Tools
Search this Thread
Display Modes