This is a genuine OEM supplied replacement part that is specially designed for Briggs and Stratton engines that are commonly installed on Toro lawn and garden equipment. It is the part that the piston is attached to. The piston is a central component of a two-cycle engine. It provides both the compression within the engine and it transfers the energy from combustion to the crankshaft which creates rotation. Please note one durable metal connecting rod is included, please note over-sized rods are sold separately.
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★★★★★
★★★★★
although i give you a 5 star rating i am reluctant to place another order with you due to length of time to recieve my parts. when i place an order on liner it is because i found what i want but i need it now not 3 to 4 weeks later.
parts and gaskets were great quality
Guest - September 10, 2020
Verified Purchase
★★★★★
★★★★★
Works great, love this company
It arrived in a very secure box came when it was supposed to
Guest - August 22, 2023
Verified Purchase
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Remove and disassemble engine.
Remove broken rod and pieces and check for any other damage.
Refinish Crank journal with emery cloth.
Attach new rod to piston and install in engine.
Reassemble all components and use new gaskets where needed.
Disconnect Battery
Disconnect Starter and Electrical Wire.
Remove Engine shroud.
Remove Intake manifold w/carb. Remove muffler.
Lower mower deck and unbolt mower transmission and blade pulley from crankshaft.
Unbolt and remove Engine from lawn tractor chassis.
Drain Oil.
Unbolt and remove cylinde
... Read morer head & remove push rods.
Unbolt and remove bottom crankcase cover.
Remove cam shaft.
Remove broken Connection Rod (note connection rod orientation on crankshaft, it will only work one way).
Push Piston up and out the cylinder.
Inspect engine case, crankshaft, piston and cylinder for any damage or scoring.
Remove retainer clip from connection rod piston pin and press out pin far enough to remove old connection rod and attach new one. Push connection rod pin back into place and replace retainer pin clip.
Check piston rings for any damage and replace if necessary.
Hone piston cylinder.
Using a piston ring compressor tool, compress piston rings on piston.
Lubricate piston cylinder. (I use Lucas Assembly Lube but regular oil will work) and slide piston back into the cylinder making sure the connection rod is orientate correctly.
Lubricate crankshaft with oil and attached connection rod. Torque to required specs.
Reinstall camshaft making sure to align timing mark on camshaft and crankshaft.
Remove and clean engine block and cover of ALL old gasket material.
Remove oil pump cover on the crankcase cover and remove oil pump gear and drive pin.
Place new crankcase gasket on engine block and replace crankcase cover. Torque to specs.
Align oil pump drive shaft with camshaft slot, replace gear and replace oil pump cover.
Remove and clean cylinder and cylinder head of ALL old head gasket material.
Place new cylinder head gasket on engine block, replace cylinder head and Torque to specs.
Remove OHV cover.
Loosen rocker arms until you are able to replace push rods.
Rotate engine until engine timing is at TDC. Adjust rocker arms to correct gap setting between rocker arm and valve.
Replace engine to lawn tractor (reverse of removal procedure).
ADD NEW OIL.
When you start using tractor again, do NOT run under full load for the first 5 to 10 hours. Change oil and filter (if equipped) after 10 hours.
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Model Cross Reference
This part works with the following models:
ERP Number: ERP9139834
Manufacturer Part Number: 794122
This part is in stock in our warehouse and will ship out within 1 business day of the order being placed.
New stock is on the way! On order parts usually ship within 7 business days.
Item is not in stock and usually ships 10-15 business days from the time you place your order.
This item is no longer being made by the manufacturer, and cannot be added to your shopping cart.
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Some of the parts we sell are eligible for mail-in rebates since we can recycle them. We will display any applicable rebates in your shopping cart. To redeem your rebate, contact Customer Service after you have received your part.
