LT1045 w/20HP Kohler Hard Starting - Page 3 - MyTractorForum.com - The Friendliest Tractor Forum and Best Place for Tractor Information
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post #31 of 37 Old 07-15-2019, 07:15 PM
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Re: LT1045 w/20HP Kohler Hard Starting

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Originally Posted by 3 Legged Dog View Post

My Husqvarna has had similar starting problems over the years. One issue was the throttle cable, which slipped at the engine tie-down clip. I would push the throttle full forward to engage the choke, but the choke was not fully closing. I loosened the clip, set the throttle to "choke", and then moved the cable until the choke connector rod was fully up and the choke was fully closed. Then I tightened the cable clip to keep it in place. Now the choke fully closes when the throttle is set to choke.

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My VERY first thought, also!

In the past:
Craftsman, MTD, Snapper, 1961 Ford 801 Powermaster, 1992 LB 4.5HP 580546, 2003 LB 10552 6.5HP Duraforce, IH Cub Cadet 105, 2001 Cub Cadet 2146 14HP Linamar 38" deck, love of my life (Sold 10 Dec 2011), 2007 Cub Cadet 2550 22HP Kohler Vtwin 50"deck (Sold 22 Aug 2018)
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1994 JD LX178 sweet little mower, only 15HP, twin cyl, 38" deck, liquid cooled!
1998 JD 445 22HP Shaft driven wheels, shaft driven 60" deck, diff-lock, hydraulic lift, power steering, fuel & temp gauges, fuel injected, and liquid cooled! This machine has it all!
2005 Nortrak NT 254 25HP Diesel 5' FEL, here's a case of cost-cutting, I only need a tractor 3 or 4 times a year

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post #32 of 37 Old 07-15-2019, 07:20 PM
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Re: LT1045 w/20HP Kohler Hard Starting

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Originally Posted by Michael Smith View Post
I have one, and it's been worked on by a pretty good small engine guy... it starts right up. BUT if I have the filter on and in place and engage the blade, it immediately bogs down and stalls. If I remove the filter, no problem. Any chance the solenoid could do THAT?
You do have a fuel flow problem there. Tell your pretty good small engine guy you are still having problems.
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post #33 of 37 Old 07-16-2019, 12:34 PM
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Re: LT1045 w/20HP Kohler Hard Starting

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Originally Posted by Flaken View Post
You do have a fuel flow problem there. Tell your pretty good small engine guy you are still having problems.
LOL Yeah, we're both trying to figure it out... I agree it's a fuel problem. New filters, new pump, totally cleaned out carb... everything is as clean as a whistle. New fuel lines, too. Runs like a champ. Starts like a champ with the filter on. Just DIES as soon as you engage the blades. Are there "it fits" filters in the world that really aren't GOOD? I don't know what kind of filter is on it, I just see it's the right fit and it's clean.
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post #34 of 37 Old 07-16-2019, 12:43 PM Thread Starter
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Re: LT1045 w/20HP Kohler Hard Starting

It could be a defective filter that isn't allowing enough air flow when the motor gets taxed when the blades engage. I would spring for a new one, just to rule it out. They are not that expensive.

I would also have a look at the blades, spindles, belt and pulleys to make sure they are not worn out and putting undue pressure on the motor when engaging.

2008 Cub Cadet LT 1045
Manufacture date: 2/20/2008
Kohler 20 HP single cyl. Twin cam OVH
Model SV600S
Spec No: SV600-0009
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post #35 of 37 Old 07-16-2019, 02:50 PM
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Re: LT1045 w/20HP Kohler Hard Starting

Fuel flow problems outside the obvious are quite difficult.
Start from the beginning of the fuel:
Check that the gas cap is vented and working properly. Often missed, don't ask how I know.
Proper flow from gas tank.
Gas line clear of any obstructions from tank to fuel filter.
Fuel filter clean/new and full flow.
Gas line from fuel filter to fuel pump clear of any obstructions.
Fuel pump working correctly.
Gas line to carb clear of obstructions.
Air filter new/clean.
Carb is clean and adjusted properly.
Idle and full throttle rpms adjusted correctly.
Valves on engine set right.

Let us know what you and the mechanic find to solve the problem.
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post #36 of 37 Old 07-16-2019, 03:53 PM
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Re: LT1045 w/20HP Kohler Hard Starting

Fuel filters have different micron ratings (how small a particle the filter will catch). It could be that the fuel filter is too "good" (small micron rating, catches really small particles), and doesn't permit a large enough rate of fuel through the filter for the engine (so it'll start, and run at idle, but as the engine needs more fuel to run at higher speeds, it can't get enough fuel to properly run.
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post #37 of 37 Old 07-16-2019, 04:18 PM Thread Starter
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Re: LT1045 w/20HP Kohler Hard Starting

Oh, I was asuming it was the air filter, but same goes for the fuel filter. Try a new one and make sure it is compatible with your motor... most small engine inline fuel filters should work fine.

2008 Cub Cadet LT 1045
Manufacture date: 2/20/2008
Kohler 20 HP single cyl. Twin cam OVH
Model SV600S
Spec No: SV600-0009
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