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  #1  
Old 10-01-2022, 04:31 PM
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Wild Bill Wild Bill is offline
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Default 1862 carb question
So I got the M18 - from an 1862 -swapped into the 1712 chassis. It runs, but not correctly. It will only run decent with the throttle all the way down, and the choke part way pulled. If I open the choke the RPMs jump up, then it chugs and puffs black smoke like its getting too much gas. Likewise if I try to give it any throttle.


So my question is:
What is the purpose of the solenoid on the Walbro carb?
It has high and low speed fuel adjustment needles, but I don't want to mess with them, if it is the solenoid.
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Old 10-01-2022, 06:21 PM
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1711Cub 1711Cub is offline
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Your 1712 was never set up for the shut off solenoid on the carb. They are not needed and just add complexity. All of my M18's use a fully adjustable(high speed mixture screw AND idle mixture screw) Carter #26 carb. Don't even bother with a Walbro fixed jet carb. I've never had one that worked all that well.
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Old 10-01-2022, 07:01 PM
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Originally Posted by 1711Cub View Post
Your 1712 was never set up for the shut off solenoid on the carb. They are not needed and just add complexity. All of my M18's use a fully adjustable(high speed mixture screw AND idle mixture screw) Carter #26 carb. Don't even bother with a Walbro fixed jet carb. I've never had one that worked all that well.
I know the 1712 didn't come with a solenoid on the carb, I've owned it for nearly 20 years.

I've heard about problems with the fixed jet Walbro, however the M18 I just swapped in, has a fully adjustable Walbro on it.

I will swap the Kohler carb off the KT17 onto this engine, and see what happens.
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Old 10-02-2022, 11:02 AM
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Did the M18 sit for a while before you swapped it? Probably just needs a cleaning and maybe a kit. Do you have a service manual? It shows how to adjust the carb, not that hard to learn. I will look for the information when I have a chance.
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Old 10-02-2022, 05:47 PM
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Did the M18 sit for a while before you swapped it? Probably just needs a cleaning and maybe a kit. Do you have a service manual? It shows how to adjust the carb, not that hard to learn. I will look for the information when I have a chance.
Yes, it has been in the garage for a few years. The carb is probably gunked up. I swapped the carb out to the one from the 1712s original engine, and that was the magic it needed.

I have all service and parts manuals, starting with the Originals - but I stopped with the 2nd series of CCC built machines. So I don't have anything on the 'cyclops' tractors.
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