Model #917272460 CRAFTSMAN Lawn, Tractor

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Question and Answers

Q:

Enguine Pops 917272460 Craftsman Lawn tractor

A:

Thanks for the inquiry and for being a valued member.

I agree with your son; the popping is more than likely coming from the valves being out of adjustment, which affects the timing. Based upon the Briggs & Stratton engine manual, the intake and exhaust valve clearances should both be set between .004" - .006". There are some great YouTube videos that show how to adjust the clearances.

Outside of the valves, the head gasket may have broken or split, which can also cause popping or backfiring. There could also be a fuel issue causing the noise. I would start with the valves and see if that solves the issue. I have linked the engine manual below.

Briggs Engine Manual for Model 407777-0174-E1

I hope this helps and thanks for using SearsPartsDirect.com. We appreciate your business. 

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Jeff Wallace Sr -
Sears Technician
March 19, 2015
Q:

No forward or rear drive 917272460 Craftsman Lawn tractor

A:

Thanks for the inquiry and for being a valued member.
I suspect that when you removed the wheel for the brake puck installation, the square key on the axle shaft was misplaced and not installed, which is why it has no movement. We do not have a visual for the brake anti-drag compression spring installation or placement, but it will go between the brake arm and brake yoke. You can refer to the schematic we have on Sears Parts under the "Hydro Gear Transaxle" for the exploded view of parts.
Hope this helps and thanks for using SearsPartsDirect.com. We appreciate your business. 

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Jeff Wallace Sr -
Sears Technician
August 13, 2014
Q:

fuel tank and hose 917272460 Craftsman Lawn tractor

A:

Remove the tank fuel line from the tank located at the forward left bottom. Drain fuel into a 2gallon bucket. Cover bucket with serran rap to prevent evaporation and dirt from entering the bucket. Next remove the tractor seat. then remove the four bolts that secure the gas tank to the upper frame. install tank in reverse order.

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Richard -
August 12, 2014
A:

Remove the tank fuel line from the tank located at the forward left bottom. Drain fuel into a 2gallon bucket. Cover bucket with serran rap to prevent evaporation and dirt from entering the bucket. Next remove the tractor seat. then remove the four bolts that secure the gas tank to the upper frame. install tank in reverse order.

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Richard -
August 12, 2014
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