Gilson snow blower engine swap with harbor freight 6.5hp engine - Snowblower Forum : Snow Blower Forums
 
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post #1 of 7 Old 01-03-2015, 04:38 AM Thread Starter
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Gilson snow blower engine swap with harbor freight 6.5hp engine

I've got a old Montgomery ward blower made by Gilson for free. The original 5hp Briggs & stratton engine 130202 was tired(lack of compression). I am thinking about swapping the old engine with the Harbor Freight 6.5hp engine.

I am having a problem with mounting the traction idler pulley onto the new engine. The original idler pulley bracket was elbow-shaped and mounted on engine with a 1/2in bolt.The bracket was linked to blower frame with a spring so that the tension of the idler was self adjusting.
The Harbor Freight engine does not have a matching mounting hole.
What option do I have to mount the idler pulley on the new engine?

I have attached a picture of the old engine set up and a picture of the new engine.
Thanks
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post #2 of 7 Old 01-03-2015, 04:53 AM
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you could rebuild that old BRIGGS engine also. and save yourself the head ache of trying to match up that stuff. ALOHA from the refrozen TUNDRA.

Long LIVE THE POWERSHIFT!! MAY IT NEVER RUST IN PEACE!!
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MAHALO!!!!!!!!!
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post #3 of 7 Old 01-03-2015, 05:00 AM Thread Starter
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I thought rebuilding the engine will be more work
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post #4 of 7 Old 01-03-2015, 05:10 AM
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Quote:
Originally Posted by tbe55 View Post
I thought rebuilding the engine will be more work
not really.

Long LIVE THE POWERSHIFT!! MAY IT NEVER RUST IN PEACE!!
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MAHALO!!!!!!!!!
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post #5 of 7 Old 01-03-2015, 07:55 AM
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I can’t seem to find the pictures but I have seen a stanchion built to support that pivot point. It was an angle iron upright anchored to the chassis You could come off the 2 top accessory holes on that crank case cover with an auxiliary plate or strap made to span over to that location to provide the mounting point. That ” bolt size was based on the socket that was already part of the engine casting. With some adapting I’m sure a 3/8” bolt would be adequate.


As for rebuilding what is ailing about the engine? Unless the cylinder walls have been damaged the need for a tear down ring job is usually gross overkill. Refitting valves, refreshing the ignition as conventional or solid state or carburetor service are usually root cause. In reality I say this more for general information. In your case the 5HP engine leaves that unit very underpowered. If I were to go through the effort I'd be looking for an 8HP engine.


Pete




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post #6 of 7 Old 01-03-2015, 08:43 AM
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Just as an FYI the piston and rings used in those old 5hp flatheads is the same as the ones used in 3 and 3.5hp B&S flatheads used on lawnmowers that you see people throw out all the time.
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post #7 of 7 Old 01-03-2015, 03:40 PM
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tbe55 -- I may be wrong, but I can't recall seeing a HF engine that was that balnd in the front section....meaning the usually they have numerous pre-threaded holes in the front area. I know the 301 cc HF engine I just used to repower a Craftsman blower surely did...
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