Briggs and Stratton engine swap - Snowblower Forum : Snow Blower Forums
 
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post #1 of 8 Old 11-21-2014, 12:37 AM Thread Starter
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Briggs and Stratton engine swap

Received a Bohlens snowblower with a blown 10hp 302 cc B&S 1450 series engine. I have a 10hp B&S PowerBOSS engine from a portable generator that I would like to put into the chasis in it's place. I think the shaft diameter on the blown engine is 7/8" - shaft length 2 5/8" and the PowerBOSS has a 1" shaft diameter (not sure of the shaft length - 3 1/2" I think - correct me if I am wrong). How hard is it going to be to figure out the pulley and belt configuration? Just want to make sure I can use this engine and figure out the pulley re-configuration and how much of a pain is really going to be?

Any advice, comments, help would be greatly apprciated
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post #2 of 8 Old 11-21-2014, 06:47 AM
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Most generators use tapered shafts, but if yours is straight then it should be pretty easy. Are the shaft heights the same? You will need to get new pulleys, but if they are the same size and the crank height is the same you can reuse the old belts.

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post #3 of 8 Old 11-21-2014, 10:56 AM Thread Starter
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I believe the shaft is straight on it. Not sure about the height from the base of the engine but I'm going to assume it is different. Is there a way to figure out the new pulleys required? or is it more of a trial and error just trying different pulleys and belt lengths?
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post #4 of 8 Old 11-21-2014, 02:37 PM
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If you have the pulley from the old engine you can get the same diameter or go up just a bit.
If you didn't get the blown engine with the pulley you can try to find one for sale and go and measure it.
call a repair shop or send a request to an on line parts seller asking the dimensions of the original.
Once you know the dimension try Pulleys & Idlers | Lawn Mower Parts | MFG Supply for a pulley with a 1" hole.

Find out the stock belt and if you're going with a similar diameter get it and one smaller and one larger or two. Let the folks at the parts store know what you're doing as they usually appreciate you taking a few and find the one rather than making ten trips buying and returning. Just keep the belts clean and don't rip the jacket they come in.

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post #5 of 8 Old 11-21-2014, 08:35 PM
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I think all gen set shafts are tapered so they can slide into the armature part. anyway ALOHA to the forms.:c ool:

Long LIVE THE POWERSHIFT!! MAY IT NEVER RUST IN PEACE!!
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post #6 of 8 Old 11-21-2014, 09:21 PM
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Quote:
Originally Posted by POWERSHIFT93 View Post
I think all gen set shafts are tapered so they can slide into the armature part. anyway ALOHA to the forms.:c ool:
I have seen some belt drive stuff, but I think that is mainly for the build it yourself type ones.

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post #7 of 8 Old 11-21-2014, 11:31 PM
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Quote:
Originally Posted by POWERSHIFT93 View Post
I think all gen set shafts are tapered so they can slide into the armature part.
They do, those engines also typically have a unique governor setup.


You could use the engine but to do it right requires swapping the crank out for one from anything but a generator engine along with the governor linkage/springs. It's also a really good idea to use a snowblower heater box instead of the air filter that came on it.
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post #8 of 8 Old 11-22-2014, 12:12 PM
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If I remember right, with a generator engine you might have to modify the throttle as the ones I was looking at were fixed and not adjustable. Unless you don't have a problem with it running full speed all the time.

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