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??
>Hi Dave, some answers below.
>----- Original Message -----
>From: "David Kernberger" <firstname.lastname@example.org>
>To: "Spridgets Listserve" <email@example.com>
>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?
>> 3) Will a 1275 flywheel bolt to the crankshaft flange of a 1098 cc
>> (10CC ID) engine?
>> 4) What are the major differences between 1275 and 1098 (10CC ID)
>> 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.
>> Dave Kernberger
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