MAC Model # ??

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Rich Lanyi
Posts: 35
Joined: Mon May 19, 2025 7:24 am
Vintage Karting items owned: Rupp-X, Rupp-Chaparral, Fox, Rathman Xterminator, Caretta
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MAC Model # ??

Post by Rich Lanyi » Wed Jun 18, 2025 5:00 pm

Is there any way to tell what model # a MAC is?
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Mark Loraine
Posts: 178
Joined: Fri May 08, 2009 10:51 pm
Vintage Karting items owned: ProX 77,McC R1,Bug Stinger Dual.
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Location: SWNY14755

Re: MAC Model # ??

Post by Mark Loraine » Thu Jun 19, 2025 11:55 am

Lets start with West Bend 510, 580 or 700. many of the 4 digit models were small displ. used on various power equipment

5.1ci, 5.8 ci or 7.0 cubic inch

recoil style indicates a late production.

PTO taper is useless, rendering this motor as part machine if its intent is for vintage karting.

Gentlemen, fill in the blanks here for me.


Mark L. / SWNY

REAR
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Joined: Sat Jun 16, 2007 10:19 am

Re: MAC Model # ??

Post by REAR » Fri Jun 20, 2025 5:51 am

There is some good parts there minus the crankshaft as Mark said.

Someone could use this engine.

R.E.A.R.

Rob Voska
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Re: MAC Model # ??

Post by Rob Voska » Fri Jun 20, 2025 3:04 pm

Take off the exhaust. If the bore is chrome it's a 700.

Mark Loraine
Posts: 178
Joined: Fri May 08, 2009 10:51 pm
Vintage Karting items owned: ProX 77,McC R1,Bug Stinger Dual.
User Agreement: Yes
Location: SWNY14755

Re: MAC Model # ??

Post by Mark Loraine » Fri Jun 20, 2025 4:36 pm

A reminder of what I posted years ago about the ribbed crankcase blocks.

It was said that they were aluminum/chrome bores, which I found to be inaccurate, as I had one here and it was definitely a cast iron liner block.

I would have to assume it’s a 5.1 cubic inch block until otherwise determined.



Mark L. / SWNY

Rich Lanyi
Posts: 35
Joined: Mon May 19, 2025 7:24 am
Vintage Karting items owned: Rupp-X, Rupp-Chaparral, Fox, Rathman Xterminator, Caretta
User Agreement: Yes

Re: MAC Model # ??

Post by Rich Lanyi » Mon Jun 23, 2025 2:00 pm

If any of you have a use for this mystery motor, you can have it for FREE. Just pay the shipping. I don't think I have the knowledge to deal with it.

Mark Loraine
Posts: 178
Joined: Fri May 08, 2009 10:51 pm
Vintage Karting items owned: ProX 77,McC R1,Bug Stinger Dual.
User Agreement: Yes
Location: SWNY14755

Re: MAC Model # ??

Post by Mark Loraine » Tue Jun 24, 2025 9:15 am

That very gracious, I'm sure someone will take you up on your offer. Remember to remove carburetor, exhaust and spark plug and some kind of sleeve over the crank to keep it from coming thorough the box. I use lint roller cardboard tubes for that.

Mark L.

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