Re: Re: Re: Re: Re: Can you put a larger engine in a Bolens tractor

Posted by Ron H. on February 24, 2003 at 13:32:51 from (12.47.72.4):

In Reply to: Re: Re: Re: Re: Can you put a larger engine in a Bolens tractor posted by KURT (Mi) on February 24, 2003 at 11:11:17:

Kurt,
I'll admit 18 inches is a lot of snow, but usually you will spin the tires or slide sideways before you will stall the engine. The real issue is traction not only for your drive wheels, but also for the front tires.

I have attached a picture (hope it works) showing my setup from last year. Look at the weight box on the back. I purchased it from JohhnyProducts (http://www.johnnyproducts.com/) and it is just the ticket. You can also see the front wheel weights - they really help keep the front wheels from sliding sideways (you can also buy chains for the fronts if needed).

With this tractor (8 hp engine) I was able to push wet slushy snow well over the top of the blade and move it up a snow bank to pile it. The trick is to find the right gear so that you have pretty good forward speed. I think I was using HI range and 2nd gear most of the time. You want the blade angled all the way to one side and be moving fast enough to have it over come the 'stiction' to slide off to the side (apply a little paste wax if you want). If you keep the blade straight you will run out of traction much quicker.

Now about your comment about torque being directly proportional to rpm. I can't argue with the math, but the torque peak hits at a different rpm range than the hp peak. Maybe somebody will jump in and give the technical details, but the real issue is what happens when you put a load on the engine. Will the governor be able to react and keep the engine in it's power band or will it try and die out so you have to push in the clutch to keep it running. These old single cylinder engines have a long stroke and can recover very well from having a sudden load applied. The newer engines with the higher hp ratings are fine with a steady load such as a mower would apply, but as soon as you start apply a variable load the rpm drops off rapidly and they fall right out of their power band.

The real issue is: Are you stalling the engine? If not more HP will not help you one bit. If you are spinning the tires then increasing traction via weight and chains is the only solution. If you find you are stalling out an HH120, you are probably taking too big of a bite at once and you might try a different technique. That engine on that tractor should do you just fine.

Sorry to sound so preachy, I really only want to provide good sound advice so that you get the most bang for your buck.

Drop me a line anytime,
Ron H.

• Rear Weight Box for Bolens Tube Frames by JohnnyProducts

Follow Ups:

• Re: Re: Re: Re: Re: Re: Can you put a larger engine in a Bolens tractor KURT (mi) 16:52:12 02/24/03 (1)
  • Re: Re: Re: Re: Re: Re: Re: Can you put a larger engine in a Bolens tractor Bob 19:49:59 02/24/03 (0)

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