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Briggs Flathead / Arcracing 6561 Crank Coun​ter We​ight questions.
« on: November 24, 2013, 07:45:52 pm »
I am wondering about the cost for machining a Briggs 28M707 crankshaft to take the brass counterweight sold by ARC racing?  On cranks with the removable concentrics they align with the pin. How do you get the alignment right and keep them from turning on a machined crank?

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Coffee Shop / Twin for Ariens rear engine riding mower
« on: November 20, 2013, 08:27:58 am »
Ariens RM1332 rear engine rider in nice shape.



The engine burn a lot of oil.  I should tear it down and rebuild the brigs diamond IC 13HP but the fool in me wants a twin.  There is not enough room between the seat and the back to mount a V-twin so I was thinking that maybe an briggs opposed twin (oppy?) might.  I prefer not to stretch the body or hang the engine out the back.  Do not want it to look butchered.

Question 1: Is it reasonable to think one could locate one and rebuild a briggs opposed twin.   Any idea on costs.

Questions 2: How much motor can one use with the friction drive?

Net says Briggs made over 4 million opposed twins and production stopped in 2003.    I love the sound of these engines.  http://www.youtube.com/watch?v=jUCx3Hp50tA

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