Welcome to the DoItYourself Forums!

To post questions, help other DIYers and reduce advertising (like the one on your left), join our DIY community. It's free!

Tecumseh connecting rod spec's for TVXL220-157203C


larry etienne's Avatar
Member

Join Date: Jun 2013
Posts: 2
MN

06-26-13, 09:46 AM   #1  
Tecumseh connecting rod spec's for TVXL220-157203C

I am replacing the connecting rod with 36898A. When I compared the new part with the old rod, the bolts are much smaller. When I torqued the bolts to 210 inch lbs, one of the bolts broke. The other bolt was stretched. The old part number was 35330A but it is superseded by 36898A. Should the torque be lower on the smaller bolts?

Larry

 
Sponsored Links
cheese's Avatar
Forum Topic Moderator

Join Date: Jul 2001
Posts: 16,574
GA

06-26-13, 09:52 AM   #2  
Yes, they should be torqued differently. I should have the info but I'll have to do some digging and find my tecumseh books.


"Who is John Galt?" - Ayn Rand (Atlas Shrugged)

God bless!

 
cheese's Avatar
Forum Topic Moderator

Join Date: Jul 2001
Posts: 16,574
GA

06-27-13, 12:54 AM   #3  
I dug up the Tecumseh binder, it only says 210 inch lbs for the TVXL220. It doesn't give any option for the rod with smaller bolts. The publication is copyrighted in 1998. I checked two other publications and one was the same, the other mentioned "Durlock" rod bolts. Durlock rod bolts have little ribs on the underside of the flange where it tightens against the aluminum rod. The book says to tighten those to 120 inch lbs, but doesn't mention any TVXL engines at all, so it may be an earlier publication from before that engine was introduced. Looking at the rod, it does look like durlock bolts.

I even looked to see what other engines this rod fits, one of which is the OVXL120. I checked the rod bolt torque for that one, same thing. Sorry, seems like either they should be torqued to 210, or the rod has changed in more recent years and my books are too old to reflect that.


"Who is John Galt?" - Ayn Rand (Atlas Shrugged)

God bless!

 
larry etienne's Avatar
Member

Join Date: Jun 2013
Posts: 2
MN

06-27-13, 03:18 PM   #4  
New torque for smaller bolts on connecting rod

I checked with a part distributor about the different part numbers for the
Tecumseh engine. His books show a lower torque of 170 inch lbs for the
smaller bolts on the newer connecting rod. That should work better than the
210 inch lbs.

Larry

 
cheese's Avatar
Forum Topic Moderator

Join Date: Jul 2001
Posts: 16,574
GA

06-28-13, 12:23 AM   #5  
Good, glad you found the info!


"Who is John Galt?" - Ayn Rand (Atlas Shrugged)

God bless!

 
Search this Thread