Antique Engines and Old Iron
[Home] - [HELP] - [Forums] - [Groups] - [Classified Ads] - [Subscribe] - [Books] - [Sponsors] -

Go Back   SmokStak > SmokStak® Antique Engine Community > Hit & Miss Gas Engine Discussion
Forgot Password? Join Us!

Notices

Hit & Miss Gas Engine Discussion Meet collectors of hit and miss engines, ask questions about collecting, restoring and showing antique flywheel engines.

Hit & Miss Gas Engine Discussion

Gilson timing questions...


this thread has 12 replies and has been viewed 2486 times

Reply
 
Thread Tools Display Modes
  #1  
Old 03-30-2012, 02:56:47 PM
Edwin
Guest
 
Posts: n/a
Default Gilson timing questions...

Hello i took my gilson apart and gave it some new paint,and i would like to know if my engine is timed correctly,it ran pretty slow last week just before i took it apart.Of course it wont run now,could someone tell me how to over look the timing and exhaust ,see i have it right with this engine.This would be alot of help to me.I have a soft spring on the gov to get it to run slow,and im trying to start in cooler weather,and have it oiled with 50 wt. oil.Will this make a difference?
thanks
Attached Thumbnails
Click image for larger version

Name:	004.jpg
Views:	65
Size:	93.7 KB
ID:	132128  
Reply With Quote
The Following 2 Users Say Thank You to For This Post:
Sponsored Links
  #2  
Old 03-30-2012, 02:59:47 PM
Ron Haskell's Avatar
Ron Haskell Ron Haskell is offline
Subscriber
 
Join Date: Nov 2004
Location: Riverside, California, USA
Posts: 588
Thanks: 471
Thanked 766 Times in 176 Posts
Default Re: Gilson timing questions....

The generic timing for flywheel engines is: exhaust valve should start
to open 35-45° before bottom dead center, and close 5° after top dead
center. Spark should occur 5-7° before top dead center for each 100
revolutions per minute. With the greater number being used for low
tension ignition and the smaller used for high tension ignition
Reply With Quote
  #3  
Old 03-30-2012, 05:19:06 PM
Edwin
Guest
 
Posts: n/a
Photo Re: Gilson timing questions....

Hello what im after is a close up pic of someones Johnny on the spot Gilson.I need a pic showing the crank and timing gear up close and some idea where it should be timed. I have a feeling the gear was mis-meshed before i had a chance to stamp it in order to know what teeth need to mesh where.Please if you have a gilson like this could someone post a close up picture of the gear, piston and cam in the same pic.I need a rough idea in order to know if mine is out of time.Here are a few more pic of the engine im having a hard time with.I feel bad in asking as i have had this engine running very well in the past.
thanks
Attached Thumbnails
Click image for larger version

Name:	007.jpg
Views:	49
Size:	120.9 KB
ID:	132134   Click image for larger version

Name:	008.jpg
Views:	51
Size:	125.1 KB
ID:	132135  
Reply With Quote
  #4  
Old 03-30-2012, 05:37:54 PM
Edwin
Guest
 
Posts: n/a
Default Re: Gilson timing questions....

just wondering if the piston is in the right spot? the exhaust valve cam is pointing straight upwards.
Attached Thumbnails
Click image for larger version

Name:	010.jpg
Views:	77
Size:	126.0 KB
ID:	132137  
Reply With Quote
  #5  
Old 03-31-2012, 05:18:45 PM
E.C. Mims E.C. Mims is offline
Subscriber
 
Join Date: Nov 2004
Location: Thomasville, Georgia
Posts: 64
Thanks: 171
Thanked 27 Times in 15 Posts
Default Re: Gilson timing questions...

Usually, a good starting point is to have the cam and the crank point straight up.
Reply With Quote
  #6  
Old 04-01-2012, 11:58:18 PM
Edwin
Guest
 
Posts: n/a
Default Re: Gilson timing questions...

So your saying the crank shaft and exhaust cam should both be pointing straight up?I really could use a good picture showing a gilson johnny close up ,so i can see how it should look.I have looked at the gilson index from a fellow stacker,Denis R, i hope someone can help me out with this mess,would really like to hear this engine run again.
Reply With Quote
  #7  
Old 04-04-2012, 04:14:29 PM
Kevin O. Pulver Kevin O. Pulver is offline
Email NOT Working
 
Join Date: Nov 2004
Location: Kenesaw, Nebraska USA
Posts: 4,256
Thanks: 1,195
Thanked 1,962 Times in 1,200 Posts
Default Re: Gilson timing questions...

Edwin,
I think you can get it without a picture. Just rotate the flywheels slowly backwards (like you're starting it) and make sure the exhaust starts to open up before bottom dead center. Then make sure the exhaust is likewise closing just before top dead center so your intake can open on the intake stroke.
Of course the pushrod or rocker arm adjustment will have something to do with it, but if you can't get it right, just move the cam one tooth ahead or back.
Then roll the engine through again, thinking to yourself, "Intake, compression, power, and exhaust" as the piston goes up and down.
Kevin

---------- Post added at 03:14 PM ---------- Previous post was at 03:12 PM ----------

To clarify, exhaust starting to open bottom dead center on the POWER stroke.
staying open until just before top dead center on the exhaust stroke.
Kevin
Reply With Quote
The Following User Says Thank You to Kevin O. Pulver For This Post:
  #8  
Old 04-04-2012, 05:06:24 PM
Edwin
Guest
 
Posts: n/a
Default Re: Gilson timing questions...

The engine she runs again!! thanks everybody i didnt have to do a thing to it other than add enough gas and add a bit more tension to the springs.Some time you just over look the small stuff
Attached Thumbnails
Click image for larger version

Name:	004.jpg
Views:	37
Size:	133.5 KB
ID:	132476  
Reply With Quote
The Following 2 Users Say Thank You to For This Post:
  #9  
Old 04-04-2012, 07:28:00 PM
casertractor casertractor is offline
Subscriber
 
Join Date: Feb 2006
Location: Milton, Ontario, Canada
Posts: 5,360
Thanks: 25,451
Thanked 5,974 Times in 2,455 Posts
Default Re: Gilson timing questions...

any video of it running Edwin?.great to see it is coming along.John
Reply With Quote
  #10  
Old 04-05-2012, 08:16:05 AM
Edwin
Guest
 
Posts: n/a
Default Re: Gilson timing questions...

http://www.youtube.com/watch?v=6B742...eature=channel

---------- Post added at 08:16 AM ---------- Previous post was at 08:11 AM ----------

Its coasts for about 11 revs,then fires.Thats as slow as i can get it to run and stay running have had it running slower just didnt stay running that long.Pretty good i think for a short stroke gilson.

Last edited by Edwin; 04-05-2012 at 08:14:01 AM. Reason: forgot video
Reply With Quote
The Following 2 Users Say Thank You to For This Post:
  #11  
Old 04-05-2012, 09:58:05 AM
Will Batty's Avatar
Will Batty Will Batty is online now
Subscriber
 
Join Date: Jan 2005
Location: Prince Albert, Saskatchewan, Canada
Posts: 657
Thanks: 1,513
Thanked 1,073 Times in 296 Posts
Default Re: Gilson timing questions...

Good Job Edwin!

Looks and runs good! My Gilson also likes to run a lil faster. Like you said with the short stroke they like to run quicker. My engine has excellent compression as well so it is not a real good super slow running engine.
Attached Thumbnails
Click image for larger version

Name:	Old Pictures 670.jpg
Views:	20
Size:	132.5 KB
ID:	132507  
Reply With Quote
The Following User Says Thank You to Will Batty For This Post:
  #12  
Old 04-05-2012, 12:10:05 PM
Edwin
Guest
 
Posts: n/a
Default Re: Gilson timing questions...

Will,think i heard your engine run ,is it on youtube?If so you have a sweet running engine.I find the carb on gilson engines doesnt have enough settings for fine tunning a slow running engine you only have a few settings,on that style carb.Full choke closed all the way, partial choke ,half choke and full open no choke.
Reply With Quote
The Following User Says Thank You to For This Post:
  #13  
Old 04-05-2012, 03:56:16 PM
casertractor casertractor is offline
Subscriber
 
Join Date: Feb 2006
Location: Milton, Ontario, Canada
Posts: 5,360
Thanks: 25,451
Thanked 5,974 Times in 2,455 Posts
Default Re: Gilson timing questions...

runs great Ed. i had not seen the video of it before you restored it. still runs great.John
Reply With Quote
Reply

Bookmarks


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

F o r u m Jump

Similar Threads Chosen at Random
Thread Thread Starter F o r u m Replies Last Post
A couple of IHC LA questions. Timing bergrider01 Hit & Miss Gas Engine Discussion 2 01-19-2011 03:26:32 PM
Stover/Economy CT1 Timing Questions Zira Hit & Miss Gas Engine Discussion 2 09-07-2010 07:33:48 PM
Montgomery ward/ Gilson and Onan questions Ken Karrow Garden Tractors and Mowers 1 08-01-2010 09:50:34 AM
Gilson questions R. Kern Hit & Miss Gas Engine Discussion 4 01-18-2009 10:46:51 PM
JB Series Timing Questions??? Cat Man Onan Generators 4 01-07-2009 05:27:57 PM


Use "Ctrl" mouse wheel to change screen size.
All times are GMT -4. The time now is 11:23:09 AM.

Smokstak and Enginads site search!


All use is subject to our TERMS OF SERVICE
SMOKSTAK® is a Registered Trade Mark - A Community of Antique Engine Enthusiasts
Copyright © 2000 - 2019 by Harry Matthews P.O. Box 5612 - Sarasota, FL 34277