Loss of power

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john2189
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Loss of power

Postby john2189 » Tue May 11, 2021 9:09 am

54DC861E-4C45-46D6-AF4E-B92E7A950CF8.jpeg

The plugs look good and healthy

Compression is #1-120 #2-115 #3- 120 #4- 120

With this good compression, should I check the valve adjustment?

Ran ok last fall when last mowed with a woods 59. Now it won’t go 10 feet and bogs down until it stalls.
Points were cleaned. New rotor and cap. No difference

Woods mower turns easy by hand.

Moves good in all three gears.
'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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Don McCombs
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Re: Loss of power

Postby Don McCombs » Tue May 11, 2021 10:38 am

Check for good fuel flow.
Don McCombs
MD, Deep Creek Lake

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john2189
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Re: Loss of power

Postby john2189 » Tue May 11, 2021 10:47 am

Don McCombs wrote:Check for good fuel flow.


I drained the tank to remove the hood. Full stream of gas until it emptied.
'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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Re: Loss of power

Postby Bob McCarty » Tue May 11, 2021 11:02 am

Did you drain it through the carb or by disconnecting the gas line from the carb. If the latter, there may be debris in the carb.
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Jim Becker
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Re: Loss of power

Postby Jim Becker » Tue May 11, 2021 11:07 am

Check your governor control and throttle linkages for free movement. It sounds a bit like your governor isn't responding.

john2189
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Re: Loss of power

Postby john2189 » Tue May 11, 2021 11:27 am

Bob McCarty wrote:Did you drain it through the carb or by disconnecting the gas line from the carb. If the latter, there may be debris in the carb.

I drains it before the carb. I will remove the carb and check it. That will make it easier to check valve adjustment too
'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

Eugene
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Re: Loss of power

Postby Eugene » Tue May 11, 2021 11:28 am

All the above suggestions and check the ignition timing.
I have an excuse. CRS.

john2189
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Re: Loss of power

Postby john2189 » Tue May 11, 2021 11:31 am

Jim Becker wrote:Check your governor control and throttle linkages for free movement. It sounds a bit like your governor isn't responding.


The last couple notches were tight so I sprayed with pblaster. Moves freely now but didn’t help much
'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

john2189
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Location: Minerva,Ohio

Re: Loss of power

Postby john2189 » Tue May 11, 2021 1:43 pm

Ok I checked the valves. #1,2,3,5 was a loose .015.
#4,6,7,8 I can’t get .015 in. The lifters will spin by hand, so I will loosen them to get the .015 in
'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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John *.?-!.* cub owner
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Re: Loss of power

Postby John *.?-!.* cub owner » Tue May 11, 2021 9:16 pm

Burned points will cause a loss of power also. Learned that the hard way when I was testing a different carb. and it would not climb a hill in 3rd. n Pulled the carb off 3 times to check it before I put the original carb on and still had same problem. New set of points and all was fine.
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john2189
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Re: Loss of power

Postby john2189 » Wed May 12, 2021 6:21 am

John *.?-!.* cub owner wrote:Burned points will cause a loss of power also. Learned that the hard way when I was testing a different carb. and it would not climb a hill in 3rd. n Pulled the carb off 3 times to check it before I put the original carb on and still had same problem. New set of points and all was fine.


It had nice blue spark, I filled the points , may have helped a little. I have a set ordered from TM Tractor
'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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Re: Loss of power

Postby Gary Dotson » Wed May 12, 2021 6:59 am

It ran fine in the Fall but now has no power, so what happened over the Winter? Maybe rust happened over the Winter. At the left front of the engine, the governor rock shaft passes through a cast support, they sometimes develop rust in that pivot that causes the governor to respond very poorly. Lubricate that location and all other governor linkage pivots. It may not be your problem but it will be one more items checked off the troubleshoot list. (and it's free and easy)

john2189
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Re: Loss of power

Postby john2189 » Wed May 12, 2021 7:40 am

Gary Dotson wrote:It ran fine in the Fall but now has no power, so what happened over the Winter? Maybe rust happened over the Winter. At the left front of the engine, the governor rock shaft passes through a cast support, they sometimes develop rust in that pivot that causes the governor to respond very poorly. Lubricate that location and all other governor linkage pivots. It may not be your problem but it will be one more items checked off the troubleshoot list. (and it's free and easy)


Since I have the hood off, I have oiled the generator and filled the fan with oil, turn it until the fill hole is on the bottom to let it drain to it level. But it is leaking oil out the back side of the pulley. Is there a seal there?

And I will oil the throttle linkage and governor
'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

User avatar
Don McCombs
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Posts: 17402
Joined: Mon Feb 03, 2003 6:45 am
Zip Code: 21550
Tractors Owned: "1950 Something" Farmall Cub
1957 Farmall Cub w/FH
1977 International Cub w/FH
1978 International Cub
1948 Farmall Super A
Circle of Safety: Y
Location: MD, Deep Creek Lake

Re: Loss of power

Postby Don McCombs » Wed May 12, 2021 7:45 am

There is no seal on that shaft. The standpipe and centrifugal force keep the oil in. You may be experiencing the drainage of some residual oil from the filling process. It should clear up in time.
Don McCombs
MD, Deep Creek Lake

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Proud Member of Maryland Chapter 39

The best teachers are those who show you where to look, but don't tell you what to see.
A. K. Trenfor

john2189
10+ Years
10+ Years
Posts: 1768
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 9:23 am

Ok I think it leaked last year when I filled it up
'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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