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#1
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My quest for a insane 128
I'm picking up this 128 and it needs a clutch and some bearing for the drive-shaft (so the lady who owns it says), the carb and engine harness are off of it due to putting a newer kohler engine it...
Here's my thought.. I'm into this thing really good and I always wanted to build some stupid ridiculous powered garden tractor that still mows the lawn. In this case, I'm thinking of going with a Harley shovel-head or EVO engine.. 1, How much power can a cub clutch hold? 2, Are aftermarket clutches available, like maybe for a modified class puller? 3, Am I just nuts and should just hop up the 12hp single that's in it? |
#2
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Putting a different engine in a cub is doable but requires considerable skill and some resources. Lots of such projects are started, but few are finished. Only you can decide if you have the dedication to make it happen. Everyone here will be very supportive, but only if you provide regular updates with lots of pictures!
I would think the cub clutch would handle 20hp or more. 12hp will easily spin the tires on the tractor without the clutch slipping, so unless you change the gearing, any power more than that will just spin the tires. For cutting grass, you are limited to the power transmitted by a single 3/8 in belt, so that's probably 10-15 hp max. Any engine larger than 20hp would be wasted in my opinion. Unless, of course, you are pulling or racing it!
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#3
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either harley engine i plan to use will be around 50-60hp.
what RPM do those 12hp kohlers spin in stock form, like say your wide open mowing your lawn... gotta be around 3000rpm, right? keep in mind, im not doing this to mow my grass in record setting speeds, im doing it just to do it and say/prove i did it.. lol.. and lets face it, wouldnt you love to more to hear your neighbor mowing his grass on a saturday morning if it got 80" of harley powering it?! concerns of mine... obviously the clutch issue, also what are the limitations of the rear trans axle? |
#4
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The cub has a cooling fan flywheel and shrouds for cooling. The Harley would overheat in a matter of minutes under mowing conditions.
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#5
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i doubt it honestly, operating temperature of a, say, 1995 80" evo engine, is about 290 degrees. thats HOT, i have no idea what a kohler 12hp runs at temp wise, but would think it would be way less.
and positioned in the cub 128 chassis, almost half of each cylinder jug and the majority of each head would be outside of the body work |
#6
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We'll knock yourself out. Lol ask anybody that has paraded an air cooled hog in hot summer conditions. At idle with no appreciable air flow, overheating is a common issue. At mowing rpm and 3-4 mph movement, it would be toast rickeyticky.
But hey it's your time and Money |
#7
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I'm with Juicybusa.
1.)You won't be able to keep it cool. 2.) Harley engines don't have a governor. How do you intend on keeping it at the 3600 RPM mark? 3.) Besides the obvious fit problems, the kohler drives the trans out one end and the mower off the other end of the crank. Harley motor= one end to connect to. How do you intend to drive the mower? I think you should think this through a little more...... If you wan't to build something ridiculous, you could just put a bigger TRACTOR motor in the TRACTOR. But hey, like I just said in another thread of similar discussion; knock yourself out. |
#8
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I agree bike engines in slow moving conditions is a nogo. I know my 79 suzki gs1000 would get extreamly warm if all I was doing is putting around town. Any air cooled engine is ment to be moving or at least having air moving passed it in pretty good ammounts. Would be a cool thing to see/have though
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1872 - 60"haban 54" power angle haban blade '63 Original - restoration project 582 -tiller 147 - leaf duty with bagger. 1811 - Ditch mower 800 - have it just cuz its a 800 |
#9
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Wouldn't a 12V radiator fan from a car provide enough air flow to cool a motorcycle engine? Just need to solve the mower PTO problem off the other side of the engine. Or just use the tractor to pull a separate self-powered mower deck.
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#10
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thats what im thinkin
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Cub Cadet is a premium line of outdoor power equipment, established in 1961 as part of International Harvester. During the 1960s, IH initiated an entirely new line of lawn and garden equipment aimed at the owners rural homes with large yards and private gardens. There were a wide variety of Cub Cadet branded and after-market attachments available; including mowers, blades, snow blowers, front loaders, plows, carts, etc. Cub Cadet advertising at that time harped on their thorough testing by "boys - acknowledged by many as the world's worst destructive force!". Cub Cadets became known for their dependability and rugged construction.
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