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Sears twin 18

3043 Views 21 Replies 7 Participants Last post by  searstractorfan
Hi guys i have a sears about 1979 or 80 twin 18 that i am wanting to make a puller out of. What are these engines RPM and how hard is it to get it up close
to 4000 RPM? Paul
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I run 26x12x12 tires, and run 2nd high..Ive NEVER gotten a motor to carry 3rd high yet...even my big N52M trys but wont...put a zip tie in the govenor spring to pull the RPMS up...that way you get the full 4000rpms.. RPMS is if you can hold the RPMS up, that means more speed you will can actually move as fast with slower speed gears as you can with bigger ones IF ur rpms are up...but change the pulleys to get the desired speed...
the only problem with changing the rear end pulley on these sears tractors, is that the shaft is ur kinda limited personally just drop the engine pulley down, OR better yet, make it bigger and get down into the low range of the tranny where the gears are a little closer...that way u have more gear choices..
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