Loss of power

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Dale Finch
10+ Years
10+ Years
Posts: 6600
Joined: Tue Apr 27, 2010 11:34 am
Zip Code: 27517
Tractors Owned: '51 Cub #140966 "Bruno" with Woods 59 mower
'55 Cub #187541 "Betty" with Fast Hitch
'55 Cub #190482 "Ben" with Woods 42 mower
'55 Cub #191739 "Bertha" with Woods 42 mower
'56 Cub #194370 "Boris" with Mott Flail mower
Circle of Safety: Y
Location: NC, Chapel Hill

Re: Loss of power

Postby Dale Finch » Wed May 12, 2021 9:35 am

john2189 wrote:Ok I think it leaked last year when I filled it up

At least you now know it has had a good oil change and "flush"! :lol:
Dale Finch
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john2189
10+ Years
10+ Years
Posts: 1764
Joined: Thu Oct 26, 2006 7:17 pm
Zip Code: 44657
Circle of Safety: Y
Location: Minerva,Ohio

Re: Loss of power

Postby john2189 » Wed May 12, 2021 9:50 am

Dale Finch wrote:
john2189 wrote:Ok I think it leaked last year when I filled it up

At least you now know it has had a good oil change and "flush"! :lol:


Yes and a big mess on my floor.
'49 Cub (Vince)
'41 allis B with Woods L59 mower
656 Wheel Horse with 42” sickle mower
C-165 Wheel Horse
Simplicity 20 HP Sunstar
Honda 48” walk behind mower

outdoors4evr
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Posts: 2781
Joined: Tue Jul 22, 2008 12:44 pm
Zip Code: 48370
Tractors Owned: 184
Location: Oxford, MI

Re: Loss of power

Postby outdoors4evr » Thu May 13, 2021 5:38 am

What changes over the winter?
Mouse nests in the various holes (check the intake)
Ethanol turns to goo
Carb dries out and leaves deposits behind
Water condensation in the oil & fuel
184 w/ Creeper & 3-Point
IH 3160a Mower
IH Model 15 Tiller
IH-54 Blade

Waif
5+ Years
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Posts: 1135
Joined: Thu Aug 25, 2016 1:29 pm
Zip Code: 49343
Tractors Owned: 48 Farmall Cub "Seen Yore Dobbin"
53 F-Cub W/Loader.
Circle of Safety: Y
Location: Michigan

Re: Loss of power

Postby Waif » Thu May 13, 2021 12:01 pm

Those are some lean fuel looking plugs.
Your gravity feed could be poor , starving fuel by a cause somewhere? Any rubber fuel line kinked or compressed or collapsing from vacuum? Filter working right?
Main jet in carb been cleaned? Choke function been studied for proper operation?

I don't like changing things without a reason , but I'd be eyeing the carbs function and adjustments as if it was a new carb install. After confirming fuel is passing through carb as it should.

john2189
10+ Years
10+ Years
Posts: 1764
Joined: Thu Oct 26, 2006 7:17 pm
Zip Code: 44657
Circle of Safety: Y
Location: Minerva,Ohio

Re: Loss of power

Postby john2189 » Thu May 13, 2021 1:52 pm

Waif wrote:Those are some lean fuel looking plugs.
Your gravity feed could be poor , starving fuel by a cause somewhere? Any rubber fuel line kinked or compressed or collapsing from vacuum? Filter working right?
Main jet in carb been cleaned? Choke function been studied for proper operation?

I don't like changing things without a reason , but I'd be eyeing the carbs function and adjustments as if it was a new carb install. After confirming fuel is passing through carb as it should.


A copper tube from tank to carb. Full flow. Will remove bowl from carb and check for dirt
'49 Cub (Vince)
'41 allis B with Woods L59 mower
656 Wheel Horse with 42” sickle mower
C-165 Wheel Horse
Simplicity 20 HP Sunstar
Honda 48” walk behind mower

Waif
5+ Years
5+ Years
Posts: 1135
Joined: Thu Aug 25, 2016 1:29 pm
Zip Code: 49343
Tractors Owned: 48 Farmall Cub "Seen Yore Dobbin"
53 F-Cub W/Loader.
Circle of Safety: Y
Location: Michigan

Re: Loss of power

Postby Waif » Thu May 13, 2021 9:10 pm

john2189 wrote:
Waif wrote:Those are some lean fuel looking plugs.
Your gravity feed could be poor , starving fuel by a cause somewhere? Any rubber fuel line kinked or compressed or collapsing from vacuum? Filter working right?
Main jet in carb been cleaned? Choke function been studied for proper operation?

I don't like changing things without a reason , but I'd be eyeing the carbs function and adjustments as if it was a new carb install. After confirming fuel is passing through carb as it should.


A copper tube from tank to carb. Full flow. Will remove bowl from carb and check for dirt


Double check for heat clearance of line if it has been changed from stock. A heatsink can be added but routing away from high heat is better.
Rare , but a heated small diameter line can act a little like a gas lamp/lantern generator. A steaming tea kettle exhaust of steam ,vs fluid.
I doubt copper vs steel heats that much faster/efficiently , but bet it can under the right conditions.

I've found a rind of ice in a main jet. And another time a rind of varnish. Clear as the ice but in warm weather. Hard to see till I ran the thin copper wire strand in it. Both reduced orifice size and restricted fuel.
Another time I didn't squint to see without cheaters/reading glasses , but wired the orifice and blew through it and it was fine after.
Had an occasional "putt" today on the 53. Tractor was working good enough and I didn't mess with it.
But eventually...The main jet will get inspected again. It has not been checked since it sat most of the winter.

john2189
10+ Years
10+ Years
Posts: 1764
Joined: Thu Oct 26, 2006 7:17 pm
Zip Code: 44657
Circle of Safety: Y
Location: Minerva,Ohio

Re: Loss of power

Postby john2189 » Thu May 13, 2021 9:20 pm

The copper tube is the one on it when I bought it in 2005. Other than a new battery,This is the first trouble I’ve had with it
'49 Cub (Vince)
'41 allis B with Woods L59 mower
656 Wheel Horse with 42” sickle mower
C-165 Wheel Horse
Simplicity 20 HP Sunstar
Honda 48” walk behind mower


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