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I am working on a 16.5 hp briggs and stratton opposing

cylinder engine and need to...
I am working on a 16.5 hp briggs and stratton opposing cylinder engine and need to find out if magneto which can be mounted two directions if placed in reverse will alter timing of sparks.
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3/13/2018
Curtis B.
Curtis B., Technician
Category: Small Engine
Satisfied Customers: 31,451
Experience: have worked on and around most engine models for 35 yrs./Polaris ATV expert
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Welcome to JUST ANSWER small engines, let me try to help you !! I don't know it all, but maybe together we can get you a satisfactory answer!

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Yes, if you can mount it upside down, it will alter the timing!

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Customer reply replied 4 months ago
should spark plug wires face toward plugs or toward the rear?

The coil mounts with the wires down, and branch out to each side. Both wires fire at the same time, so it really does not matter which wire goes where!

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Customer reply replied 4 months ago
My recollection is that both wires exit on the same side maybe I need to reverse mounting

Model number? Vertical or horizontal crankshaft?

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Customer reply replied 4 months ago
Vertical shaft opposing cylinders model 42A707 2238 e1

Wires should exit on the left side of the armature.

Curtis B.
Curtis B., Technician
Category: Small Engine
Satisfied Customers: 31,451
Experience: have worked on and around most engine models for 35 yrs./Polaris ATV expert
Verified
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Customer reply replied 4 months ago
Thanks

Thank you!

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