My 154 won’t start…

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ihcc104
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My 154 won’t start…

Postby ihcc104 » Sun Dec 18, 2022 12:04 pm

I am at a loss. I was trying to start the tractor after sitting for 6-8 months and it will not start. Getting spark and will pop off on either on full choke… but will not start on gas. New carb because I thought the old one was gummed up beyond repair because I took it apart and cleaned it; turned air mixture screw out 1-1/2 turns on the new carb and not even a pop. I’m at a loss; it is pissing me off. This tractor has been so loyal and always has started no matter the circumstances. The engine was rebuilt 2 winters ago. Any suggestions? Thanks. I’m not new to these tractors; this is my 3rd one and I have countless Cub Cadets.

Cory Sanderson

brose1958
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Re: My 154 won’t start…

Postby brose1958 » Sun Dec 18, 2022 12:27 pm

Gas fouled spark plugs?

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Don McCombs
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Re: My 154 won’t start…

Postby Don McCombs » Sun Dec 18, 2022 12:40 pm

May seem obvious, but have you checked the fuel tank level and turned the fuel valve on? We have all BTDT.
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Bob McCarty
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Re: My 154 won’t start…

Postby Bob McCarty » Sun Dec 18, 2022 12:50 pm

Did you check the float adjustment on the new carb?
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ihcc104
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Re: My 154 won’t start…

Postby ihcc104 » Sun Dec 18, 2022 2:46 pm

I will pull the plugs and look; I have not done so yet…

Gas is in the tank and flowing nicely to the carb. I’ve been there at one point or another too lol

Do you know what the “normal” float level should be? I’ve never adjusted one. It does need to be almost all the way up to stop fuel flow.

Cory Sanderson

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Don McCombs
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Re: My 154 won’t start…

Postby Don McCombs » Sun Dec 18, 2022 5:52 pm

Assuming that you have an IHC carb or repro...

Carburetor Float Settings.jpg
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brose1958
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Re: My 154 won’t start…

Postby brose1958 » Sun Dec 18, 2022 7:47 pm

A lesson I learned a long time ago while working as a mechanic in a shell service station ( when you did not pump your own gas). You can not tell if a spark plug is gas fouled by looking at it or fix it by cleaning it... Replace the plugs and see what happens.

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ihcc104
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Tractors Owned: :
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Location: Moodus, CT

Re: My 154 won’t start…

Postby ihcc104 » Sun Dec 18, 2022 9:19 pm

brose1958 wrote:A lesson I learned a long time ago while working as a mechanic in a shell service station ( when you did not pump your own gas). You can not tell if a spark plug is gas fouled by looking at it or fix it by cleaning it... Replace the plugs and see what happens.


If they were in fact fouled… would it still run on starting fluid?

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Re: My 154 won’t start…

Postby brose1958 » Mon Dec 19, 2022 9:43 am

It is possible as it is much more flammable.

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Re: My 154 won’t start…

Postby Duner » Mon Dec 19, 2022 4:30 pm

ihcc104, "Gas is in the tank and flowing nicely to the carb"
We have gas to the carb, Do we have gas into the float bowl??

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Re: My 154 won’t start…

Postby Eugene » Mon Dec 19, 2022 7:48 pm

ihcc104 wrote:I was trying to start the tractor after sitting for 6-8 months and it will not start. Getting spark and will pop off on ether on full choke.
Conduct 100% engine tune. Start with compression tests. Stuck valve - valves.
I have an excuse. CRS.

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Re: My 154 won’t start…

Postby FSJNut » Mon Dec 19, 2022 9:48 pm

I've had new carbs come with the needle stuck to the seat not letting any fuel get to the bowl like Duner said. If you disconnect the carb fuel inlet and blow compressed air in the carb you can break it free.
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Re: My 154 won’t start…

Postby elmrfudd » Sat Apr 08, 2023 8:24 pm

Did you verify your firing sequence on your distributor (1-3-4-2), and that all plug wires are securely fastened to their plugs/cap posts? You may consider the possibility of sticking or improperly seating valves, as well. That would inhibit the ability to pull fuel and air mixture into the intake. Are you spraying ether in the air intake or spark plug hole? Well, it sounds like you have fuel, air, and spark. There are two things left that’s likely to to prevent starting…..compression and ignition timing. I still haven’t heard whether or not fuel is being pulled from the carb and making it to the combustion chamber.

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Re: My 154 won’t start…

Postby Rusty red » Fri Apr 28, 2023 10:17 am

If the gas has sat in the tank for 6-8 months I would try fresh gas. I had it go bad on me in over the winter before.


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