2 stroke engine in a Cub Cadet ?

jeepchicken5000 · #1 06-04-2015, 10:49 PM

hey guys, new to custom cubs but have taken a few apart, I have a cub 1100 that I just went and repainted it and so on, today drove it about 50 feet and the rear end let go inside somewhere I have no gears, also the briggs engine needs work as the carb is shot. Anyway I have a Polaris 440 2 stroke engine and a parts 1250 with complete rear end, whats the max rated rpm for these rear ends and ive read that you can put in a stiffer relief spring so that it will run, just looking at it for a toy not going to do any pulling with it. Rpm on the 2 stroke my dad said was 7000 Rpm , any info or web sites let me know and will see how my progress goes

green 4 acres · #2 06-04-2015, 11:21 PM

The Idle is going to be higher than the 4stroke 1100?
and the bucking at idle RPM would be a concern IMO
you have to be very careful of the load on the crank as the only lubrication is from the oil in the fuel . you would have to gear it down a lot or it could be dangerous IMO

olds45512 · #3 06-05-2015, 12:43 AM

stuff the swing arm under the cub and chain drive it, should do awesome donuts.

J-Mech · #4 06-05-2015, 04:53 AM

Quote:

Originally Posted by jeepchicken5000

Anyway I have a Polaris 440 2 stroke engine and a parts 1250 with complete rear end, whats the max rated rpm for these rear ends and ive read that you can put in a stiffer relief spring so that it will run, just looking at it for a toy not going to do any pulling with it. Rpm on the 2 stroke my dad said was 7000 Rpm , any info or web sites let me know and will see how my progress goes

Hydrostat: 4K rpm.
Your wrong about the relief spring

Quote:

Originally Posted by green 4 acres

The Idle is going to be higher than the 4stroke 1100?
and the bucking at idle RPM would be a concern IMO
you have to be very careful of the load on the crank as the only lubrication is from the oil in the fuel . you would have to gear it down a lot or it could be dangerous IMO

It's a ball bearing crank. Your incorrect about the load. It won't hurt it at all.

sbauerz28 · #5 06-05-2015, 07:33 AM

I've tipped a Rupp Nitro 440 on it's side and ran it on a racing mower. What you are trying to do should work just fine.

jeepchicken5000 · #6 06-05-2015, 08:04 AM

thanks for the info J mech, someone said that you could increase the hydro pump so that it will work above 4k rpm not sure if they are right or wrong , might be best to use a standard rear end then but I don't have one as to why the hydrostatic , its just a toy and idea for around the yard and to look col maybe put it out front for others to see as long as it runs and moves is all I care cause it doesn't now

dvogtvpe · #7 06-05-2015, 09:15 PM

I'd stay with the Polaris clutch's . build a jackshaft. use the secondary. then drive off the jackshaft to a small automotive differential narrowed up.

jeepchicken5000 · #8 06-10-2015, 08:10 AM

ok guys my dad , brother and my friend all worked together and came up with this , fits in great, runs pretty good and drives . its pretty slow even in forth gear . still got plenty of other work to do . we only saved the engine from the sled nothing else, this is why we did it this way and its direct from engine to gear box with the stock drive shaft

mickb72 · #9 06-10-2015, 08:56 AM

Pretty neat. Why so slow? Is that a 90* belt drive trans? I/ve got one coming together with a geo 3cyl. Only problem is only one cub part, transaxel. Mike

sbauerz28 · #10 06-10-2015, 09:22 AM

nice set-up. I'm sure it would run better with an expansion chamber.