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Old Feb 19, 2013 | 10:34 PM
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1983 6.9 starter

Is there a difference in starters between the 83-84 6.9's and the later models, the specs say the earlier ones are 10 tooth and the later are 13, will the later model 6.9/7.3 gear reduction one work?
 
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Old Feb 20, 2013 | 12:05 AM
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Im not sure what it takes, but i know most guy with direct starters usually swap to the gear reductions. might do some searching, but my guess is they interchange.
 
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Old Feb 20, 2013 | 02:38 AM
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Originally Posted by 1989_f250
Is there a difference in starters between the 83-84 6.9's and the later models, the specs say the earlier ones are 10 tooth and the later are 13, will the later model 6.9/7.3 gear reduction one work?
Yes, it will be better. The reason they went to a gear reduction is the compression of these engines makes it hard to crank over so they reduced the gears so it would make it easier on starters. The flywheel is the same.
 
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Old Feb 20, 2013 | 02:19 PM
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Yes because earlier 6.9's (83-early 84) had lower compression than all the other years. So they could use the old direct drive starters.


You will love the gear reduction if you put one on!
 
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Old Feb 20, 2013 | 02:58 PM
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you can get the OEM Mitsubishi gear reduction reman at auto zone with lifetime warranty priced decently to boot fyi.
duralast #16561.
 
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Old Feb 21, 2013 | 03:39 AM
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Originally Posted by IDIDieselJohn
Yes because earlier 6.9's (83-early 84) had lower compression than all the other years. So they could use the old direct drive starters.


You will love the gear reduction if you put one on!
Good to know. What CR are they running in those years?
 
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Old Feb 21, 2013 | 06:02 AM
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If I remember correctly, the older 6.9's is 19.5:1 ratio, compared to 21.5:1 on all others. Something like that.
 
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