Valve clearence or another issue? - Snowblower Forum : Snow Blower Forums
 
LinkBack Thread Tools
post #1 of 4 Old 02-03-2019, 05:47 PM Thread Starter
Junior Member
 
Join Date: Feb 2019
Posts: 2
Post Thanks / Like
Thanks (Given): 0
Thanks (Received): 0
Likes (Given): 0
Likes (Received): 0
Valve clearence or another issue?

So on my Yardworks snow king tecumseh engine I'm having issues of my exhaust getting red hot and spitting blue flames. So initially I thought it was the exhaust valve being open at the same time as the intake which is partially true. So at top dead centre both valves are tight shut but on the intake stroke the exhaust valve is not fully closing. So I am wondering if the problem is valve timing or something else. Any help would be great!
joshA98 is offline  
Sponsored Links
Advertisement
 
post #2 of 4 Old 02-03-2019, 05:58 PM
Senior Member
 
classiccat's Avatar
 
Join Date: Mar 2014
Location: Albany, New York
Posts: 1,552
Post Thanks / Like
Thanks (Given): 177
Thanks (Received): 156
Likes (Given): 1636
Likes (Received): 381
The only valve timing happens when the engines are assembled; crank and cam are synced-up by lining-up the marks on the cam / crank gears.

If it's a points ignition, you do time the spark advance by rotating the magneto...nothing to do with valve timing.

Have you actually measured the clearances?

If not, open the breather and put a feeler gauge between the lifter / valve stem for a flathead (or between the rocker and valve stem on an OHV).


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
('72 Sears 3520)

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
('89 Toro 824)

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
('70 Allis-Chalmers Tracker-7)

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
('80 Toro 724)

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
('95 Ariens ST724) --> Sold

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
('71 Ariens 910965 SnoThro 524)
classiccat is offline  
post #3 of 4 Old 02-03-2019, 06:09 PM Thread Starter
Junior Member
 
Join Date: Feb 2019
Posts: 2
Post Thanks / Like
Thanks (Given): 0
Thanks (Received): 0
Likes (Given): 0
Likes (Received): 0
Quote:
Originally Posted by classiccat View Post
The only valve timing happens when the engines are assembled; crank and cam are synced-up by lining-up the marks on the cam / crank gears.

If it's a points ignition, you do time the spark advance by rotating the magneto...nothing to do with valve timing.

Have you actually measured the clearances?


If not, open the breather and put a feeler gauge between the lifter / valve stem for a flathead (or between the rocker and valve stem on an OHV).
I have tried but the screen seems to be putting up a big fight to come out
joshA98 is offline  
post #4 of 4 Old 02-12-2019, 06:52 PM
Senior Member
 
Join Date: Nov 2016
Posts: 115
Post Thanks / Like
Thanks (Given): 1
Thanks (Received): 7
Likes (Given): 1
Likes (Received): 18
There’s a inner case with the screen. Sometimes it stuck to the block with additional gasket. Just put a screwdriver at corner and slightly pry it out.

New Jersey, Toro 8/24, Ariens 5/22, small engine repairs
Bluejoe is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Snowblower Forum : Snow Blower Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

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:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may post new threads
You may 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 On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome