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JR Pedersen

68 Commando 8 runs for 30 minutes then won't start

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JR Pedersen

Last night I was cutting my grass for about 30 minutes and everything was working great...shut it off for dinner and came back and it would run for 30 seconds only on "Full" Choke and then stalls.

Any ideas what might be the issue?

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953 nut

Could be time to do some fuel system maintenance. 

Is there gas in the tank?        :hide:

Are you using gasoline with Ethanol?    If you are then STOP.   Ethanol will kill the fuel system. You can find a station that sells real gasoline on this site.https://www.pure-gas.org/

Check the outlet from the tank to see that it is not obstructed.

Replace the fuel hose and filter.

Check the fuel pump to see that it is pumping.

The carburetor may need to be rebuilt.

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rmaynard

Check the cap on your tank. The vent may be clogged.

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JR Pedersen
1 hour ago, rmaynard said:

Check the cap on your tank. The vent may be clogged.

Thank you...I'll start with this and move onto the advice from 953 nut

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JR Pedersen
1 hour ago, 953 nut said:

Could be time to do some fuel system maintenance. 

Is there gas in the tank?        :hide:

Are you using gasoline with Ethanol?    If you are then STOP.   Ethanol will kill the fuel system. You can find a station that sells real gasoline on this site.https://www.pure-gas.org/

Check the outlet from the tank to see that it is not obstructed.

Replace the fuel hose and filter.

Check the fuel pump to see that it is pumping.

The carburetor may need to be rebuilt.

Thanks for all this info - hope to start getting into the maintenance this weekend!

Also thank you for serving our country!

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ri702bill

Dad'd 702 did the same thing. It ran great until you shut it off. The rings are quite a bit tired - carbon would bridge the spark plug gap giving a no start condition. An inline spark checker shows it HAS spark, but it is shorting out. Clean the plug, it starts right up......

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Retired Wrencher
22 hours ago, rmaynard said:

Check the cap on your tank. The vent may be clogged.

I agree with that Bob lots of people overlooked that.

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