Back firing

MoMac · Jun 6, 2023

I have an old Speedex that has been sitting for awhile. Cleaned the tank and put in fresh gas. Cleaned the spark plug. Now it backfires through the carb and won't
start.Any ideas? It's a Brigs 5 HP with up draft carb.

J Hamilton · Jun 6, 2023

Check the valves to be sure one is not stuck or not fully closing, also would check the flywheel key

T.R.K. · Jun 6, 2023

The intake valve is not sealing. Either the valve is stuck or else carbon is keeping it from completely seating in its seat.

Back firing

MoMac

Member

J Hamilton

Well-known Member

T.R.K.

Well-known Member

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