Medium
1-2 hours
It is an identical replacement for a worn or a missing component that was installed on a new unit. The thermostat measures the temperature. This part is supplied by the original manufacturer for use with Briggs and Stratton engines that are commonly installed on lawn and garden equipment. To ensure the correct repair procedure, check the diagrams for your specific model. A screwdriver and pliers might be needed to replace this component. Keep in mind this high-quality item includes the thermostat, two gaskets, and two metal springs.
Thermostat 798938
OEM part for: Briggs and Stratton
Part Number: 798938
$39.97
In Stock
Ships within 1 business day 
Compatibility
This Thermostat will fit the following 631 machines. Confirm this part works with your model, and view the detailed model diagrams and repair help we have to offer.
Briggs and Stratton
Show More Compatible ModelsThis item works with the following types of products:
- Engine Parts
Customer Part Reviews ?
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Great part
Arrived as described
Guest -
July 30, 2019
Verified Purchase
Easy repair
The repair was easy, just remove the guard and two bolts to remove the muffler and thermostat. The only reason this didnt get 5 5 stars is that the product photo shows the connecting rods as part of the package but neither were included in the box I received , luckily mine wasnt damaged so I didnt need it.
Guest -
August 9, 2019
Verified Purchase
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Customer Repair Instructions ?
All our customer repair instructions are solicited directly from other customers just like you who have purchased and replaced this exact part.
power washer had blown head gasket ,a bad thermostat and broken muffler bolts
Joe - April 16, 2020
👍 0 of 1 people found this instruction helpful
Tool Type
Engine
Difficulty
Medium
Time
1-2 hours
Tools Used
Screwdriver, Power Drill, Socket set, feeler gauge, wire brush
Remove carb, muffler,flywheel cover, flywheel and engine head, check for damage to valves and piston, clean cylinder head and top of piston, replace head gasket and head, adjust valves to manufactures specs, replace carband other parts that were removed, sounds complicated but it`s really not.
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Our customer service team are at the ready daily to answer your part and product questions. We have a dedicated staff with decades of collective experience in helping customers just like you purchase parts to repair their products.
All our part reviews are solicited directly from other customers who have purchased this exact part. While we moderate these reviews for profanity, offensive language or personally identifiable information, these reviews are posted exactly as submitted and no alterations are made by our team.
All our customer repair instructions are solicited directly from other customers just like you who have purchased and replaced this exact part. While we moderate these reviews for profanity, offensive language or personally identifiable information, these reviews are posted exactly as submitted and no alterations are made by our team.
Based on data from past customer purchasing behaviors, these parts are most commonly purchased together along with the part you are viewing. These parts may be necessary or helpful to replace to complete your current repair.
All our installation videos are created and produced in collaboration with our in-house repair technician, Mark Sodja, who has helped millions of eReplacementParts customers over the last 13 years repair their products. Mark has years of experience in selling and repairing both commercial and residential products with a specialty in gas-powered equipment.
This data is collected from customers who submitted a repair instruction after replacing this exact part. Customers can rate how easy the repair was to complete and how long it took. We aggregate this data to provide a repair rating that allows customers to quickly determine the difficulty and time needed to perform their own repair.
