[andyfrost]

The Mark 25A was used on Auto Cultos , Colebys and some generators ,along with various makes of twoman chainsaws, same bore size to the model you quote , and I believe shared the same piston rings.
I’ve only seen the Mk17A on ex WD water pumps , and a few Auto Cultos.

Andy

• This reply was modified 3 years, 8 months ago by andyfrost.

[andyfrost]

We must also consider that in our hobby machines with their original factory matchung engine/chassis numbers are few and far between. Users back in the day , would use used parts from donor machines.

Andy.

[andyfrost]

New parts turn up from time to time on continental E-Bay sites , worth keeping a look out.
On these shores they are next to impossible to find , striking lucky with someone who has had some spares on the shelf for years is your only hope albeit very slim.

Andy.

[andyfrost]

Wishing all of you a healthy and happy Christmas…….. may all your nuts and bolts undo easily , your magnetos spark , and your fuel flow.

Above all stay safe.

Andy.

[andyfrost]

I’m at long last using a fuel addative (the Briggs and Stratton one) , early days yet , as my fuel is seldom kept that long , but starting and running issues are non existant…….. expensive , but it seems so far like money well spent.

Andy.

[andyfrost]

Another great effort from all involved.
Renewed my membership before it came , and have recieved card back…. a HUGE thanks Charlie.

Andy.

[andyfrost]

Good day , and a warm welcome to our forum. A truly lovely machine you have there , and it appears to be in full working order.
I have long thought that the continental machines were light years ahead of our offerings , reverse gear , reversable ploughs , and overall build quality, Alot of ours(but not all) were cumbersome , cronic to use with no reverse , and coventional ploughs.

Andy.

[andyfrost]

If the felt is still intact , simply wash it in petrol , dry it thoroughly and put a couple of drops of engine oil on it , squeaze gently between thumb and forefinger…….job done.

Andy.

[andyfrost]

“I agree that the Bingham working days were fun and it’s a shame when these things develop into competitions because the fun aspect tends to get forgotten and the pursuit of prizes is all consuming.”

Absolutely spot on , the very reason that I never have , or will get involved in ploughing events.

Andy.

[andyfrost]

Only my opinion , but I would NEVER skimp when it comes to magneto components , it’s worth every penny to renew all the components , it will give you effortless starting every time.
Forget about testing with a multimeter , there is a very good reason why purpose built ignition testers were made.
George at villiersparts used to do the complete kit for the 25c , he may still do , either way he would be able to supply all the parts that you’ll need.
The cam that you refer to is the “electronic govenor” , if you tease it GENTLY with a suitable screwdriver you should be able to just open it , if it’s opening and closing OK , then simply leave it alone.

Andy

[andyfrost]

That seems to appear the wrong strength govenor spring.

Andy.

[andyfrost]

Peter , any chance of a pic of your govenor weight housing assembly.
Can you manually rev the engine and feel the govenor working??

Andy.

[andyfrost]

Peter , you’ll get there , the various throttle systems on JAPs are all fairly straightforward.

Andy.

[andyfrost]

Peter , it’s just not noisey enough….. but very nice.

[andyfrost]

Small components = blasting cabinet, Larger components= various wirewheels and elbow grease.

Andy

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