10 replies to this topic

[nath]

just wondering because cant find my flywheel ring gear..
are they all the same?? off 998 1275 ?
as got 3 complete 998 engines but the 1275 has no ring gear
would i be able to nick it off the 998 and put it on the 1275?
thanks

[ado15]

I don't think you can get the ring gear off in one piece.

The only differences relate to the clutch/flywheel (Verto/Pre-Verto) types and the starter motor type (inertia/pre-engaged). So, if you have an appropriate flywheel off a 998 with a good ring gear, you can use the entire item.

Edited by ado15, 15 October 2010 - 02:20 PM.

[Cooperman]

Ring gears are 'sweated' onto the flywheel and cannot be removed without cutting them off.
All pre-Verto ring gears are the same, but Verto ones are different.
You can use a different flywheel, so long as it's the right type i.e. Verto or pre-Verto.

[nath]

oh :/ jus looking in minisport catalogue and it shows the ring(with teeth) seperately but its called inertia?? thanks

[ado15]

That's right. The ring gear is just the outer ring. It is heated up to expand it and dropped onto the flywheel. When it cools, it shrinks tight onto the flywheel.

Does your starter motor have an integral solenoid on it? This would be a pre-engaged starter motor and would only be used with a Verto flywheel.

If your solenoid is mounted on the inner wing, you should have an inertia starter motor. These were used on all pre-verto flywheels and early Verto ones. So, in this case, you would need to know what clutch type you have.

Does that make sense?

Edited by ado15, 15 October 2010 - 02:57 PM.

[nath]

yes its pre engaged...
dont understand the verto - pre verto part :/?

[nath]

yes its pre engaged...
dont understand the verto - pre verto part :/?

[nath]

oh and just the outer ring... would i be able to get it sweated off the old clutch and get it sweated onto the new one?

[nath]

right confused now :L


make it simple
will a 998 clutch starter motor and flywheel go straight onto a 1275 engine?
( might not be as good, last as long but would be ok for me to try )

[ado15]

OK, back to basics.

There is no difference between 998 and 1275 clutches as such.

In around 1980 the clutch type changed from what is now known as the pre-Verto to the Verto type. Basically, two totally different designs. They used different flywheels and ring gears. But the starter motor remained an inertia type.

In 1986 the starter motor changed to the pre-engaged type. The ring gear also changed at this point.

So.....

If you have a pre-engaged starter motor, you can only use the Verto type clutch because this was all that was available to suit that starter motor. But, you need a ring gear suited to this type of starter. Not the easiest of things to explain how to identify in writing though!

What I would suggest is if one of your 998's had a pre-engaged starter fitted, you can use the flywheel from this engine. The entire clutch will also be OK to use on the 1275.

Is that any clearer? It can be difficult to explain these things on a forum. Much easier to show people real bits!

Oh, and you can't 'sweat' the ring gear off the flywheel. It can only be removed by breaking it off with a chisel.

Edited by ado15, 16 October 2010 - 07:17 AM.

[partsguy1]

Actually that is not true, I have a Verto ring gear on a Pre-Verto Flywheel. You just need OXY/ ACETYLENE and a large blow torch nozzle.