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Re: [Spridgets] 1098/1275 clutch, flywheel questions

To: "Paul Asgeirsson" <PAsgeirsson@worldnet.att.net>
Subject: Re: [Spridgets] 1098/1275 clutch, flywheel questions
From: David Kernberger <dkern@napanet.net>
Date: Sat, 15 Sep 2007 17:28:04 -0800
Hi Paul,

        As often in the past, thanks for your quick and helpful 
answers.  By identifying the 1098 as a "10CC", I meant to indicate 
the 2" mains.  Probably would have been beter to just say that.  One 
more short question---Are all the ring gears about the same outside 
diameter and number of teeth??

Dave Kernberger


>Hi Dave,  some answers below.
>----- Original Message -----
>From: "David Kernberger" <dkern@napanet.net>
>To: "Spridgets Listserve" <spridgets@autox.team.net>
>Sent: Friday, September 14, 2007 5:35 PM
>Subject: [Spridgets] 1098/1275 clutch, flywheel questions
>>  To the group,
>>  I just signed on to this list and have a group of related
>>  questions.  I would appreciate any answers to all/part of the list
>>  anybody can provide.
>>  1) Are 1098 cc (10CC ID) and 948 cc engine flywheel ring gears the same??
>Nearly!!  The ID is close to the 1098.  948=9.225" and does NOT have a notch
>around the perimeter.
>ID of the 1098=9.322" and has a notch around the perimeter to match a raised
>lip on the 1098 flywheel.  That's to prevent it from sliding off from
>theimpact of the inertia drive starter.
>There are also differences in the center of the 1098 flywheels as there are
>2 1098 engine crankshafts.  a 2" main and a 1 3/4" main.
>All 3 of the above flywheels have just 4 bolt holes in any of them, and have
>flat backs to them.
>The 1275 flywheel has 2 locating dowel holes and 6 bolt holes.  It will bolt
>up only one way as the locating dowels are located asymetrically.  This
>won't bolt up to any other engine.
>The 1275 ring gear is 9.350 I.D. but it differs from the others as there is
>some relief on the ring gear so the starter pinion won't dingle along the
>ring gear when the engine runs.  It too has an internal notch to match a
>ridge on the dlywheel, and the flywheel has machining on it that has sculped
>out a lot of material on the cblock side.  It's also the lightest of all the
>flywheels in it's stock form.  948 is the heaviest.
>Some of the made in India ring gears sold under the trade name of County
>come in a variety of shapes and sizes.  They also sometimes look like all
>the teeth were hand files by school kids.
>1275 flywheels show up routinely on EBay and can be rehabbed rather nicely.
>Later, paul A
>>  2) If not, what is the difference?
>See above
>>  3) Will a 1275 flywheel bolt to the crankshaft flange of a 1098 cc
>>  (10CC ID) engine?
>See above
>>  4) What are the major differences between 1275 and 1098 (10CC ID)
>See above!
>>  I know this may sound like a crazy bunch of questions but I
>>  really am looking for definitive answers to them all.  My major
>>  problem is I do not have a 1275 flywheel currently in my colletion in
>>  order to check it out myself.  Thanks in advance for any help anybody
>>  can be.
>>  Cheers,
>>  Dave Kernberger
>>  _______________________________________________
>  pasgeirsson@worldnet.att.net

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