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Arrow/Notch on Top of Piston
Where should the arrow or notch on the top of the piston point to?
For the majority of our engines, this arrow or notch should point to the magneto (flywheel) side of the engine.
The exception to this would be vertical Inteks in the 120000 Model Series. When installing a piston in these engines, the notch should face the PTO (crankshaft).
The manufacture date of your engine can be determined using its Code Number. For an explanation of our numbering system, please visit our Numerical Designation System page.
Please read and abide by any applicable Safety Information contained in your engine Operator's Manual. The material provided above is not intended to replace work performed by a Briggs & Stratton Authorized Dealer. Terms and Conditions apply to all of the information presented on this website. Always be sure to completely read and understand your engine Operator's Manual.
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