Cub engine swap

The Cub Club -- Questions and answers to all of your Cub related issues.

Moderator: Team Cub

Forum rules
Notice: For sale and wanted posts are not allowed in this forum. Please use our free classifieds or one of our site sponsors for your tractor and parts needs.
User avatar
Indy4570
501 Club
501 Club
Posts: 861
Joined: Tue Nov 28, 2017 2:12 am
Zip Code: 65608
Tractors Owned: 49 F cub, donor
50 Farmall Cub bugeyes(dead)
51 Farmall Cub
53 Farmall Cub
55 Farmall Cub Clementine
55 International loboy
57 International loboy
62 140 Industrial The Beast
50s Allis Chalmers B
50 Ferguson TO20 Huppster
49 Ferguson TE20 Fergie
JD 790 4x4 w/backhoe
Gilson 18HP
Circle of Safety: Y
Location: Missouri Ozarks

Re: Cub engine swap

Postby Indy4570 » Tue Aug 21, 2018 11:07 pm

I have a chevette with a tiny lil diesel in it, I have wondered how much work it would take to graft that onto a cub :P
Circle of Safety
better to have it and not need it than to need it and not have it...( YES this includes CUBS! )

Chevysnfarmalls
Posts: 15
Joined: Tue Aug 21, 2018 8:09 pm
Zip Code: 47374

Re: Cub engine swap

Postby Chevysnfarmalls » Wed Aug 22, 2018 5:35 am

Indy4570 look up the cub bota its a cub with a Kubota diesel in it. He tells how much work it was and what All he had to do.

inairam
5+ Years
5+ Years
Posts: 1718
Joined: Wed Jul 08, 2015 10:24 am
Zip Code: 19342
Tractors Owned: 1948 6v - Dozer
1949 with kub klipper belly mower. mag 6v - Mom
1950 with plow, 54 blade, mott mag 6v - Roxanne
1953 54 blade, c22, wood 42 6v
1957 with c-2 mower & c-54 grader blade 6v - barn Queen
1965 lo-boy with c-3 mower 12 v - Loboy
1974 Horse II 12 v
1975 with homemade mower 12 v - Horse
1979 long strip 12 v stuck engine
130 with international 1000 loader 6 v
1969 140 with bush hog tow behind mower 6 v
Memberships: Rough and Tumble Engineers Historical Association;Chapter 8 IH Collectors; IH Collectors Worldwide
Circle of Safety: Y
Location: Glen Mills PA

Re: Cub engine swap

Postby inairam » Wed Aug 22, 2018 6:15 am

Reel mowers are what golf courses use on the tees, fairways, and greens. Golf courses do use reel mowers in the rough to cut grass at about 2" but if you cut most grasses/ weed combo lawns that height it will stress the plant and you run a high risk of killing the lawn. The grasses on golf courses are different and the level of maintenance ( chemical and fertilizer) is very different than what you see with most home lawns. This is why you do not see reel mowers on zero turns marketed for home lawn use. Grass height is key to a healthy lawn. Close to the house, I go for 3-4 inches and the further away 6"-8"

I grew up pulling 3, 5 and 7 and for a short while 9 gange reel mowers with cubs and numbered loboys. They are great for cutting large flat areas. They do cut the grass low and unless have the equipment and know what you are doing they are more difficult to keep sharp. They are also useless if the grass gets high on you. I use a tow behind rough cut mower with it own engine.

In addition, most modern reel movers are hydraulicly driven ( unlike the gang mowers which are wheel driven) and are usually much more expensive to maintain than a belt driven mower.

Keep the cub in good tune, use sharp blades, look at other mower options and you should have no problems cutting 2 acres with a Cub even if you miss a week here and there. A second cub is always a good idea :D but in your case, it helps as a backup and lets you easily use a different mower ( like a woods 42 or c2) to set at a different height and better suited for high grass if you miss a cut or two.

I think the time and money spent on an engine swap project for a lawn mower Cub would be better spent elsewhere.

If you want to swap the engine as a project you want to do go for it and post pictures.
When you only have 9 horsepower you need to know the names of all of the ponies!

outdoors4evr
10+ Years
10+ Years
Posts: 2268
Joined: Tue Jul 22, 2008 12:44 pm
Zip Code: 48370
Tractors Owned: 184
Location: Oxford, MI

Re: Cub engine swap

Postby outdoors4evr » Wed Aug 22, 2018 2:34 pm

Just rebuild it with the upgrades of a later cub. A rebuilt cub should have no issue running a 60" mower deck for lawn mowing purposes.

Or... If you are doing a lot of mowing, trade it in for a numbered lowboy with a 60" mower deck.

Note: reel mowers seem to roll over the weeds and mows the grass. The weeds grow faster than the grass. If you aren't mowing every time the highest weed gets 2.5" then it won't do well. This is a big issue in the spring. You can control the weeds with 2-4-D.
184 w/ Creeper & 3-Point
IH 3160a Mower
IH Model 15 Tiller
IH-54 Blade

User avatar
IHCFan1950
Cub Star!
Cub Star!
Posts: 200
Joined: Mon Jun 11, 2018 12:59 pm
Zip Code: 71119
Tractors Owned: 1950 Farmall Cub (Barn fire survivor) "Ruthie"
1951 Farmall Cub
1990 Kubota L2250
Circle of Safety: Y
Location: Shreveport, LA

Re: Cub engine swap

Postby IHCFan1950 » Wed Aug 22, 2018 6:15 pm

Chevysnfarmalls wrote:I don't always have time to mow as often as I'd like


Get you a set of shorty headers, bore the block .30 over, put a better Comp cam in it, port the intakes, and slap a Holley double pumper on there and that ought to fix you right up!! :lol: :lol: :lol: :lol: :lol:
If you own 1 tractor you have a interest
If you own 2 tractors you have a hobby
If you own 3 tractors you have an addiction
Anything over that..well your incurable! :lol:

1950 Cub (barn fire survivor) Ruthie
1951 Cub no name yet
1991 Kubota L2250
Circle of Safety

User avatar
Willy
501 Club
501 Club
Posts: 518
Joined: Sun Oct 22, 2017 4:54 pm
Zip Code: 38330
Tractors Owned: 1951 Cub Lil Red
Location: Dyer, TN

Re: Cub engine swap

Postby Willy » Wed Aug 22, 2018 6:33 pm

Now that I've got a working 3 point hitch on mine, I've been kicking around the idea of adapting a 48 or 54 inch lawn tractor deck to it using the lawn mower engine to just power the deck. If I find one with a bad transaxle, just whack off the un-needed bits and add what I need to hook it up to the hitch. If Mrs Willy's 48" Husqvarna transaxle would ever go ahead and give up the ghost, it'd be perfect. :lol:
Waking up the ol' Cub

Nah, it's not leaking oil. It's just marking it's territory.

Chevysnfarmalls
Posts: 15
Joined: Tue Aug 21, 2018 8:09 pm
Zip Code: 47374

Re: Cub engine swap

Postby Chevysnfarmalls » Wed Aug 22, 2018 6:39 pm

Willy best of luck with the husqvarna.
Ihcfan thats a good plan n all but I dont think it'll work out quite the way I want lol

ntrenn
5+ Years
5+ Years
Posts: 707
Joined: Tue Apr 17, 2012 7:55 pm
Zip Code: 47119
Skype Name: ntrenn
Tractors Owned: 63 Cub 221833 in family since '69
65 Lo-boy 19648 with an un-stuck #4 - it lives!!!
144 Cultivators with disc hillers
193 Plow
42C mower
59L mower mounted on the Fcub
23A Disc - lost possession
Circle of Safety: Y
Location: Indiana

Re: Cub engine swap

Postby ntrenn » Wed Aug 22, 2018 7:56 pm

Isn’t the c123 the super a/100/140 engine?? Waaayyy too much for a cub!! Cub cuts great with a Woods 59 with a whole bunch of ifs. Good tune, good mower settings, not too much fertilizer..... the shortest route to more power might be numbered lowboy pistons and governor....

Crimson Tim
5+ Years
5+ Years
Posts: 483
Joined: Wed Feb 19, 2014 1:09 pm
Zip Code: 32736
Tractors Owned: The crew:
"John", 1952 Cub
"Paul", 1951 Cub
"George", 1958 LoBoy Cub with Wagner 45 Loader
"Ringo", 1977 Cub

So far, Paul and Ringo have arrived. John and George were supposed to follow ages ago, but apparently have gone awol. Long story.
Circle of Safety: Y

Re: Cub engine swap

Postby Crimson Tim » Wed Aug 22, 2018 8:28 pm

What happened to that company that was getting ready to sell turbo kits for the Cub?


Here we are: viewtopic.php?f=1&t=98928&hilit=Turbo

Personally, id like to try the woods 59 with that, though I’m not keen on the price...

User avatar
IHCFan1950
Cub Star!
Cub Star!
Posts: 200
Joined: Mon Jun 11, 2018 12:59 pm
Zip Code: 71119
Tractors Owned: 1950 Farmall Cub (Barn fire survivor) "Ruthie"
1951 Farmall Cub
1990 Kubota L2250
Circle of Safety: Y
Location: Shreveport, LA

Re: Cub engine swap

Postby IHCFan1950 » Thu Aug 23, 2018 8:59 am

I just wish we could put a flathead V8 in it like those Ford guys do with their NAAs and 8ns. :wink:

Ok, in all due seriousness now. The aftermarket Zenith carbs are a bit bigger than the IH ones, and they are touted as giving you a little extra. And a "little" means just that, a "little". From what I have heard, a lot of power is lost in the valve train. Just the nature of the beast. Now, a more reasonable proposal is to do an engine swap with a late Cub (1970s vintage), because those put out lots more HP than the older Cubs did. Lots here is relative. If I remember right, they were in the neighborhood of 12-14 HP.
If you own 1 tractor you have a interest
If you own 2 tractors you have a hobby
If you own 3 tractors you have an addiction
Anything over that..well your incurable! :lol:

1950 Cub (barn fire survivor) Ruthie
1951 Cub no name yet
1991 Kubota L2250
Circle of Safety

User avatar
Willy
501 Club
501 Club
Posts: 518
Joined: Sun Oct 22, 2017 4:54 pm
Zip Code: 38330
Tractors Owned: 1951 Cub Lil Red
Location: Dyer, TN

Re: Cub engine swap

Postby Willy » Thu Aug 23, 2018 9:29 am

I know that IH made a higher compression head and that would help some too. With the Cub, I've just been keeping it the way it is and doing the maintenance. I have fiddled around a little with old flathead Willys Jeep engines. Those will respond a bit to various tweaks here and there, the usual being the higher compression head (Kaiser Supersonic or milled stock), Weber 2bl carb, better flowing exhaust and intake, and electronic ignition. The point is that by themselves, not much difference, but add them all up and things start getting interesting.

But powertrain wise, I'm keeping the Cub stock. Now, if I could put a stronger hydraulic lift on it.....
Waking up the ol' Cub

Nah, it's not leaking oil. It's just marking it's territory.

staninlowerAL
5+ Years
5+ Years
Posts: 3975
Joined: Fri Oct 29, 2010 11:34 pm
Zip Code: 36558
Tractors Owned: Cubs: (3)'49's, (1 is parts), (1)'57 IH Cub LoBoy w/FH, (2)154 Number Series Loboys, (1 is parts), '76 Longstripe w/FH, Mowers: C-22, Bush Hog 412, Pennington 59, Woods RM42CF, Woods 42, assorted FCub plows, planters, discs, etc. OTHERS: '49 AC B & Ind. Sickle mower, '61 AC D12 Ser 2, '52 8N, '56 Ferguson 35 Deluxe, '53 MM BG (offset), (2) '49 Avery V's, '51 JD M (regular), '56 JD 420C, with Blade and fire plow, '85 JD 850 (Yanmar) w/72" belly mower, '76? Yanmar 2TR15 1500, '78? FORD Dexta, '86 FORD LGT14D & 48" Mower, (4) Sears Surburban's, MTD's, Jeeps & other misc. "treasures"
Circle of Safety: Y
Location: AL (Southwest)

Re: Cub engine swap

Postby staninlowerAL » Thu Aug 23, 2018 1:48 pm

IHCFan1950 wrote:.........do an engine swap with a late Cub (1970s vintage)........
I think rockfarmer (and probably some others) have done this and used a number series loboy engine.

Chevysnfarmalls
Posts: 15
Joined: Tue Aug 21, 2018 8:09 pm
Zip Code: 47374

Re: Cub engine swap

Postby Chevysnfarmalls » Thu Aug 23, 2018 1:50 pm

Can you machine the head for morw compression? Will newer numbered cub pistons fit the older block?

staninlowerAL
5+ Years
5+ Years
Posts: 3975
Joined: Fri Oct 29, 2010 11:34 pm
Zip Code: 36558
Tractors Owned: Cubs: (3)'49's, (1 is parts), (1)'57 IH Cub LoBoy w/FH, (2)154 Number Series Loboys, (1 is parts), '76 Longstripe w/FH, Mowers: C-22, Bush Hog 412, Pennington 59, Woods RM42CF, Woods 42, assorted FCub plows, planters, discs, etc. OTHERS: '49 AC B & Ind. Sickle mower, '61 AC D12 Ser 2, '52 8N, '56 Ferguson 35 Deluxe, '53 MM BG (offset), (2) '49 Avery V's, '51 JD M (regular), '56 JD 420C, with Blade and fire plow, '85 JD 850 (Yanmar) w/72" belly mower, '76? Yanmar 2TR15 1500, '78? FORD Dexta, '86 FORD LGT14D & 48" Mower, (4) Sears Surburban's, MTD's, Jeeps & other misc. "treasures"
Circle of Safety: Y
Location: AL (Southwest)

Re: Cub engine swap

Postby staninlowerAL » Thu Aug 23, 2018 1:59 pm

You can take a little off but not much. Domed pistons are aluminum and extend above the top of the block and protrude into the head cavity. Check the parts list for what is compatible, I believe the connecting rods are a different part number for domed pistons. There were also some changes made to the manifold to work better with the Zenith carb and some governor changes that allowed a higher operating rpm. All this only netted a slight increase in hp as has already been noted.

jsfarmall
501 Club
501 Club
Posts: 604
Joined: Sat Oct 22, 2016 1:04 pm
Zip Code: 72454
Tractors Owned: 1948 Cub "Trusty"
1948 Cub "Rusty"
1948 Cub "Bob"
1948 Cub "Sallie" (wife's tractor)
1965 IH Cub "Annie"
1943 Farmall H
1953 Farmall Super M (granddad's tractor)

Re: Cub engine swap

Postby jsfarmall » Thu Aug 23, 2018 7:41 pm

Any C60 cub engine will bolt up to the bell housing regardless of year. The late 185 engines had more ponies. Are you on flat ground or hills? I mow with a woods 59 on a 48 cub. Love it. It don't like tall grass though. Regular lawn mowing it's beautiful and I feel it's slightly under powered compared to my other cub.
1948 Cub "Trusty"
1948 Cub "Rusty" mower tractor, trimmed ear dash
1948 Cub "Bob"
1948 Cub "Sallie"
1965 IH Cub "Annie" mower tractor,
1943 Farmall H,
1953 Farmall Super M


  • Similar Topics
    Replies
    Views
    Last post

Return to “Farmall Cub”

Who is online

Users browsing this forum: Mht, thecoolstew and 2 guests