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Curtis B.
Curtis B., Technician
Category: Small Engine
Satisfied Customers: 26059
Experience:  have worked on and around most engine models for 35 yrs./Polaris ATV expert
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Briggs has several engines 28B707, 28M707, 286707, and 287707. JA:

Customer Question

Briggs has several engines 28B707, 28M707, 286707, and 287707.
JA: I'll do all I can to help. Tell me a bit more about what's going on so we can help you best.
Customer: They use the exact same piston, but each engine has different hp. Bore and stroke are identical. How is the hp different for each one?
JA: Is there anything else important you think the Small Engine Technician should know?
Customer: I am about to get all four different engines running. just curious how they have different hp ratings when the piston is the same part number on all of them.
JA: OK. Got it. I'm sending you to a secure page on JustAnswer so you can place the $5 fully-refundable deposit now. While you're filling out that form, I'll tell the Small Engine Technician about your situation and then connect you two.
Submitted: 7 months ago.
Category: Small Engine
Expert:  Curtis B. replied 7 months ago.
The ratings are based on the maximum rpm that the OEM wants the engine to run! The higher the rpm, the higher the horsepower rating!
Expert:  Curtis B. replied 7 months ago.
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