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Pony motor specs for D4 7J series

Pony motor specs for D4 7J series

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Dan1942D4
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I've got new undersize main bearings for the pony motor on my 1942 D4 7J.  The machine shop that I have regrinding the crankshaft has asked if I can determine what clearance is needed between shaft and bearing for lubrication purposes.  Anyone know where I can find this spec?  There's lots of manuals for the main engines, and for parts for the pony motor, but I'm having trouble finding service info. for the pony motor.
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Fri, Jun 14, 2024 3:53 AM
rax200
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Hi Dan1942D4,
this is what you are after

  [attachment=76814]engine specs 4.jpg[/attachment]

Regards
Attachment
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Fri, Jun 14, 2024 5:58 AM
kittyman1
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Reply to rax200:
Hi Dan1942D4,
this is what you are after

  [attachment=76814]engine specs 4.jpg[/attachment]

Regards
Attachment
Rough rule of thumb: One thousands Inch clearance per Inch Diameter of Journal...at the tightest my guess...looser is fine as well
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Fri, Jun 14, 2024 12:42 PM
Dan1942D4
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Reply to kittyman1:
Rough rule of thumb: One thousands Inch clearance per Inch Diameter of Journal...at the tightest my guess...looser is fine as well
Daryl and kittyman1,
Thank you gents for your responses. Very helpful.
Dan
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Thu, Jun 27, 2024 4:35 AM
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