Small backfire / popping from exhaust

[dawgn86]

Good afternoon,

Mower: 2014 Craftsman T3000 / Model 917-203900 with 440 hours. Engine is a 22 HP Briggs platinum / Model 44R677 Type 0021 G1 ( info from the valve cover).

This mower sat for 5-6 years when the in laws gave it to me. I took of the carb and cleaned / fresh gas / new plugs / drained old fuel / replaced fuel and air filter and got the mower running pretty good. It now has a small backfire / popping sound about every ten seconds that sounds like it is more from the exhaust side.

What do you folks think? Valves need adjusting?

Thanks

 

[7394]

If it did NOT have that backfire when in-laws had it. Valves didn't need adjusted from just sitting. IMO.

 

[Tiger Small Engine]

Good afternoon,

Mower: 2014 Craftsman T3000 / Model 917-203900 with 440 hours. Engine is a 22 HP Briggs platinum / Model 44R677 Type 0021 G1 ( info from the valve cover).

This mower sat for 5-6 years when the in laws gave it to me. I took of the carb and cleaned / fresh gas / new plugs / drained old fuel / replaced fuel and air filter and got the mower running pretty good. It now has a small backfire / popping sound about every ten seconds that sounds like it is more from the exhaust side.

What do you folks think? Valves need adjusting?

Thanks

Does it have a double barrel Nikki carburetor on it? I think the carburetor needs to be cleaned again. These specific carburetors are known to make popping and small backfires when not totally clean.

 

[dawgn86]

Tiger,

it does and I will clean it again next chance I can...

Thanks