Author Topic: Special timing idler gear on Plus models?  (Read 270 times)

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Offline douglas1947

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Special timing idler gear on Plus models?
« on: 23 Sep 2022 at 15:08 »
Last year I bought an 80 Plus model.
There were several parts missing, also on the engine.
The cam gears are there, but the cam idler gear was missing.
I have now 2 different idler gears - a standard T35 (photo left, with long stub) and a special one (photo right, with short stub).
The short stub gear has the timing marks on the non stub side. May be it is for Plus models?

I hope someone knows the gears and can tell me, what I should use in the engine.

Michael

Offline douglas1947

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Re: Special timing idler gear on Plus models?
« Reply #1 on: 23 Sep 2022 at 15:10 »
Extra photo from the other side of the gears.

Michael

Offline douglas1947

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Re: Special timing idler gear on Plus models?
« Reply #2 on: 28 Sep 2022 at 08:24 »
Hi all,

I still have the hope to get informations about the timing gears of the plus models.
I want to to start re-assamlbe the engine in the next days and would like to knowwhat parts to fit to the crankcase (and what bushes to make).

I will be happy for every information.

Michael

Offline phil1

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Re: Special timing idler gear on Plus models?
« Reply #3 on: 28 Sep 2022 at 14:00 »
Hi Michael
                 Hope the photo helps, this is my mk v. phil.


[Reformat image.  28Sep22, Doug, admin]
« Last Edit: 28 Sep 2022 at 14:30 by Doug »

Offline douglas1947

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Re: Special timing idler gear on Plus models?
« Reply #4 on: 30 Sep 2022 at 16:21 »
Hi Phil,

thanks for your photo to give me help.
But unfortunatly it do not help, because it is a MK engine.

My problem are 2 different idler gears I have (difference in length of axle). The longer one is a standard MK one, the short one is unknown.

I think the front crankcase (Plus to MK) has a small difference in the timing chest, f. ex. you can not extract the cam pinions and get them out without splitting the crankcase halves.

At the moment I can do no test, because the engine is assembled.

Michael


Michael

That is the reason I would like to know, if there is a special idler for the Plus models.

Offline DSIM

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Re: Special timing idler gear on Plus models?
« Reply #5 on: Today at 13:25 »
Michael
The Plus models have a different nose on the crankshaft as it has to accommodate the ball bearing as well as the bronze bush. The crankshaft drive gear on the standard T35 has a space between the gears but on the Plus the  drive gears butt up. Also the  PLUS GA drawing I have shows fine teeth for the cam drive and coarse teeth for the magneto drive, it also  shows the cam idler gear with short stubb towards the rear, the Plus camshaft gears also have the stubb towards the rear so the cam gears all line up and mesh correctly.
Best regards ChrisS

 

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