Small Engine Repair: Adjusting Valves or Valve Lash on a Tecumseh Lawn Mower

**Always follow the instructions in your repair manual when doing repair or maintenance work on Outdoor Power Equipment. Manuals can be found at the manufacturers website.**

This video shows how to adjust the valve lash on a Tecumseh engine. Manuals for all Tecumseh engines can be found online and for free. The method used to adjust the valves in this video is similar to the method used on other industrial engines that require valve adjustment and have rocker arms.

Tools Used:
- Feeler Gauge
- T20, T30 Torx Wrench
- 7/16" Crowfoot Wrench
- 3/16" Allen Wrench
- Torque Wrench

Specification:
- Tecumseh Engine Model OVMR120
- Valve Lash for both Intake and Exhaust Valve is .004"
- Torque Spec for Lock Nut on the Valve Lash Adjustment Bolt is 120 in. lbs
- Torque Spec for Rocker Cover Bolts is 40 in. lbs

Category:

Autos & Vehicles

Tags:

• Howto
• tutorial
• instructional
• outdoor
• power
• equipment
• industrial
• engine
• DIY
• walk
• behind
• mower

[stampy7777]

Great video Is it possible for the piston to be top dead centre and not be on the compression stroke?

Thanks

[smallengineshop]

@stampy7777 Yes. The piston is at top dead center between the exhaust and intake stroke. Thanks for watching!

[FlyBoyMike1000]

Good video. Can you replace the T-30 bolts with standard ones?

[smallengineshop]

@FlyBoyMike1000 I guess you can as long as there the same grade and there is room. Thanks for watching!

[th19940305]

What brand lift bench is that

[smallengineshop]

@th19940305 Its a Harbor Freight motorcycle lift.

[MRSketch09]

@smallengineshop Alright. Thanks very much!

[smallengineshop]

@MRSketch09 I have always enjoyed working with my hands and working on engines, so I don't really have a point in time where I went from feeling anxious to confident. If this is an issue for you, and you want to learn small engine repair, than take a class with hands on work with an instructor to help you.

[MRSketch09]

@smallengineshop Thanks for the answer. Now another question, wherd'd you get the confidence to feel like you could do it? Serious question.

[smallengineshop]

@MRSketch09 Reading, listening and doing. Thanks for watching!