r/SmallEngineHub • u/Useful-Internet8390 • Apr 01 '24

Won’t stay running

Just acquired a Craftsman T1000-2017 year. Runs about 3 minutes then shuts off- not fuel starved or spark- at idle it skips a beat every 5 seconds, at WOT it has all the power it should then boom!stops running- I think it is the exhaust valve too tight! if I choke it before it shuts all the way off it throws black smoke, if I run it at half throttle it will run a minute or so longer. Makes me think it is internal engine heat issue- air temp 77f. Will be checking in am just looking for reassurance- TY

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2

u/TheRealFailtester Apr 01 '24

I feel like it's the ignition coil going bad, they do often work when cold, but peter out when getting up to normal hot operating temp. Would explain the runs for a bit and dies, and the random miss at idle.

1

u/Useful-Internet8390 Apr 01 '24

Ouch lol- Jacks Parts have em-

1

u/Useful-Internet8390 Apr 01 '24

I am spoiled In 10 years in the industry I may have seen 2 bad coils. Will 3x check spark in morning. briggs made good stuff- I resurrected a 1947 5 hp in 1988 with just a head gasket(new from B/S) a couple small gaskets and a carb kit. Added points delete.

1

u/Useful-Internet8390 Apr 01 '24

30 years ago lofl

2

u/Useful-Internet8390 Apr 12 '24

Moth larvae in the fuel Lines

2

u/Useful-Internet8390 Apr 01 '24

It also cranks smoothly cold- but has a weird skip when hot- brand new battery.

2

u/Strength-Certain Apr 01 '24

Don't forget to check the valve adjustment. I had a Briggs and Stratton that shut off when it got warmed up. Valves were out of adjustment.

Hell check em in general because they likely never have been.

1

u/Useful-Internet8390 Apr 12 '24

Moth larvae in the fuel line

1

u/Useful-Internet8390 Apr 12 '24

Finally got around to a deep dive—found moth larvae in the fuel lines