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Questions and Answers | Return to The CJ2A Home Page Re: 12 V Starter

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Posted by Wes K on September 10, 2002 at 23:48:10:

In Reply to: Posted by on September 09, 2002 at 02:07:00:

What Matt says is often true. Most 6 volt starters in good condition can handle twelve volts if you don't sit on the start button for too long. If you're trying to crank a stubborn engine it won't last very long. Can't think of number for a 12 volt replacement. Best bet is to carry your six volt to the store and match shaft length and size and match pinion drive gear diameter and tooth count. You didn't say what model jeep you had. The L-4's in the military and CJ's had three different flywheel ring gear counts. 97 tooth on the WWII and early CJ2A's, 124 tooth on early CJ3A and M38's and 129 tooth on the rest. There is a production 12 volt starter for the 97 tooth flywheel ring gear Model MZ-4124 and it will replace the old MZ-4112 and MZ-4113. The later F head starters available in 6 and 12 voltcan be confusing. The MZ-4137 and MZ-4162 are 6 volt and require the rear pinion shaft support bearing in the back face of the bell housing. The MCH series starters were 12 volt but fit the newer F head bellhousing. To use one of these sMCH starters you would have to install the later F head bell housing. Be carefull with young inexperienced counter help at the parts counter. They will probably think a F head is a flathead. You'll have to explain to the that the L-134 is the traditional flathead and the F-134 is the Morphadite (4 exh valves in the block and 4 intakes in the head.).

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: What Matt says is often true. Most 6 volt starters in good condition can handle twelve volts if you don't sit on the start button for too long. If you're trying to crank a stubborn engine it won't last very long. Can't think of number for a 12 volt replacement. Best bet is to carry your six volt to the store and match shaft length and size and match pinion drive gear diameter and tooth count. You didn't say what model jeep you had. The L-4's in the military and CJ's had three different flywheel ring gear counts. 97 tooth on the WWII and early CJ2A's, 124 tooth on early CJ3A and M38's and 129 tooth on the rest. There is a production 12 volt starter for the 97 tooth flywheel ring gear Model MZ-4124 and it will replace the old MZ-4112 and MZ-4113. The later F head starters available in 6 and 12 voltcan be confusing. The MZ-4137 and MZ-4162 are 6 volt and require the rear pinion shaft support bearing in the back face of the bell housing. The MCH series starters were 12 volt but fit the newer F head bellhousing. To use one of these sMCH starters you would have to install the later F head bell housing. Be carefull with young inexperienced counter help at the parts counter. They will probably think a F head is a flathead. You'll have to explain to the that the L-134 is the traditional flathead and the F-134 is the Morphadite (4 exh valves in the block and 4 intakes in the head.).

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