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Reload this Page Cub Cadet 2135 surging
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  #1  
Old 04-09-2020, 12:30 PM
CubNewb CubNewb is offline
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Join Date: Apr 2020
Location: Illinois
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Default Cub Cadet 2135 surging
Good morning/afternoon

New to the forum and new to riding mowers/tractors. I recently grabbed (a week ago) a used 2135 with 43 hours on it. It was sitting for a several years then brought back to life by previous owner before selling. They put on a new carb, oil change, new plug.

The cub took several cranks and playing with the choke to get it started, roughly 15 seconds of cranking. I emptied the tank, put in ethanol free gas and replaced the fuel filter. Still has the same cranking issue. But when it fired up it ran like a champ. But every time you started, hot or cold it would crank for 15 seconds and require some playing with the choke.

Me being a tinkerer I decided to adjust the low idle speed screw as per manufacturers recommendation, but without any way to confirm RPMs other than by ear.
Since doing this the cub has been surging when it gets above 1/2 way on the throttle. I have tried adjusting it back but with no luck so far.

Any suggestions on the surging? Hints, tips, tricks? Totally at a loss right now.
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  #2  
Old 04-09-2020, 01:17 PM
R Bedell R Bedell is offline
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First, welcome to OCC.............

Try adjusting your High Speed Idle, on the Carb, on the "rich" side. See if it smooths out.
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[B]Roland Bedell[/B]

CC Models: 100, 105, 1450, 782, (2) 784, & 2072

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Old 04-09-2020, 01:23 PM
CubNewb CubNewb is offline
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Quote:
Originally Posted by R Bedell View Post
First, welcome to OCC.............

Try adjusting your High Speed Idle, on the Carb, on the "rich" side. See if it smooths out.
Sadly only 1 screw on the carb. I did choke it a little with the throttle high and it runs like a champ again. Will stick with that until new fuel pump and hoses arrive.
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Old 04-09-2020, 01:27 PM
R Bedell R Bedell is offline
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Quote:
I did choke it a little with the throttle high and it runs like a champ again
That indicates (A) too much air, or (B) not enough fuel.

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[B]Roland Bedell[/B]

CC Models: 100, 105, 1450, 782, (2) 784, & 2072

[SIZE="4"][B][COLOR="Red"]Buy:[/COLOR][COLOR="Blue"] Made in the USA[/COLOR][/B] [/SIZE]:American Flag 1:
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  #5  
Old 04-09-2020, 01:45 PM
CubNewb CubNewb is offline
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I am guessing I have a fuel delivery issue, pump is on order, hoping that fixes both the surging issue and the long cranking sessions to get it started
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  #6  
Old 04-10-2020, 01:19 PM
CubNewb CubNewb is offline
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Update: I changed the fuel pump, put in an E3 spark plug and gapped according to spec.

Still have to choke it at full throttle. Still cranks for a while and requires a few different choke positions in order to turn over

Any ideas on what I can try next?

Totally at a loss here
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