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Garden Tractors / Mowers / Scooters Vintage lawn and garden tractors, mowers, snowmobiles and other old machinery that is driven by small air cooled engines.

Garden Tractors / Mowers / Scooters

Converting A Vertical Shaft Lawnmower engine to a horizontal shaft


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  #1  
Old 12-04-2005, 12:23:03 AM
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Question Converting A Vertical Shaft Lawnmower engine to a horizontal shaft

For my first attempt at making a model engine i thought to save on casting costs i would just use a lawnmower engine and make a new base for it and add a couple flywheels. Has this ever been attempted before??

Jordan
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Old 12-04-2005, 01:02:14 AM
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Dick Graybill Dick Graybill is offline
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Default Re: Converting A Vertical Shaft Lawnmower engine to a horizontal shaft

I Haen't Seen That Done But, I Have Seen Briggs 5s And Briggs Fh Converted To Hit And Miss. I Have Pictures If I Could Figure How To Upload.dick In Central Pa.
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Old 12-04-2005, 01:25:29 AM
BWegher BWegher is offline
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Default Re: Converting A Vertical Shaft Lawnmower engine to a horizontal shaft

Sure.
The first rotary mower engines were horizontal PTO converted to vertical PTO
and some were 2-strokes.
Flywheels have a big impact on RPM.
Don't forget that you will have to adjust spark timing. Easier to find an engine that has a mag that can be turned. Most B&S don't have that.
The splash oiling will be messed up. And the carb will have to be turned, etc.
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Old 12-04-2005, 01:59:38 AM
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Default Re: Converting A Vertical Shaft Lawnmower engine to a horizontal shaft

Here is an example of a Briggs FH that has been turned into a Hit & Miss engine. An excellent job, I think.
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Old 12-04-2005, 10:51:29 AM
Leonard Keifer Leonard Keifer is offline
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Default Re: Converting A Vertical Shaft Lawnmower engine to a horizontal shaft

If you're going to attempt this conversion I'd stay away from the vertical shaft, too many possible complications. Briggs 5S or 6S should work or possibly a Clinton model 700 or 800. I've seen the Briggs conversion, don't remember seeing a Clinton conversion.

The Briggs FH looks nice because of the external push rod but I hate to see a restorable FH cut up. Besides to me it would be hard to justify chopping up a $250 - 300 engine. But each to his own.
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Old 12-04-2005, 06:23:36 PM
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Default Re: Converting A Vertical Shaft Lawnmower engine to a horizontal shaft

There is one for sale on Ebay right now. Item #7567414039. I also seen a couple of these engines at Steam Corner about three years ago. They looked like a lot of fun!!
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Old 12-05-2005, 07:36:58 PM
George Fair George Fair is offline
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Default Re: Converting A Vertical Shaft Lawnmower engine to a horizontal shaft

Hi Jordan,

Back in June of 2001 “Gas Engine Magazine” was desperate for material and printed a story about a homemade engine that was called “The VBS Engine”. It was made from VOLKSWAGEN parts, BRIGG (& Stratton) parts and SCRAP.

The following site has more pictures of the “VBS Engine”:
http://members.fortunecity.com/nitro.../yougotme.html

Please do not use a collectible engine for your project! If your homemade engine starts easy and runs I’m sure it will attract attention at old engine shows. Spectators are always interested in something different.

George Fair
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Old 12-05-2005, 08:49:01 PM
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Default Re: Converting A Vertical Shaft Lawnmower engine to a horizontal shaft

Hi George,

I have no intentions of using a collectable engine. If I find one that is missing lots of parts i'll use that one instead of a complete one.
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Old 12-05-2005, 09:42:38 PM
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Default Re: Converting A Vertical Shaft Lawnmower engine to a horizontal shaft

About 10 or 12 years ago, I got interested in hit-n-miss engines. Only problem was, I couldn't afford one. So, I took an old 11 HP briggs and "rearranged" it a bit. Now I have a hit-n-miss briggs. I used most all of the briggs parts (crank, cam, piston, governor, connecting rod and cylinder) and a few home-rigged parts. I made a frame out of 3" channel and some 1/4" plate steel, mounted some pillow block bearings for the crank and bolted the cylinder with 4 bolts through the head, cylinder and flat plate. The flywheels came from old textile machinery I bought for 3 cents a pound. And, I almost forgot, it's Chevy powered (points, condenser and coil). It runs great and draws a lot of attention at shows. I had it at Portland this year, anyone remember it? And, by the way, I used a vertical shaft engine. The valve arrangement is perfect for hit-n-miss setup.
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Old 12-05-2005, 10:05:34 PM
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Default Re: Converting A Vertical Shaft Lawnmower engine to a horizontal shaft

wow...thats odd.

doesn't that take some inginuity? i'd like to do something odd like that but i lack the machinery. thus i cant do off the wall stuff...but i sure can try!
but guess im doing some sort of good, i've done alot of things in the past that was said that couldn't be done... hehehe
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