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Joined: Jan 2018
Posts: 24
Novice
Hi Everyone,
My newly acquired Supercut, possibly will be in need of an engine swap.
The Villiers 2stroke, doesnt seem to want to run.... I havent given up hope just yet, but i would like to arm myself with some options if the Villiers is to be retired.

Has any one had experience in retrofitting a later 4 stroke engine, EG briggs 3.5hp 550 Series?

Any tips/info would be great.

Aiden

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Joined: Nov 2013
Posts: 6,938
Likes: 312
Forum Historian
Hello Aiden
This is the bigger Villiers Mk25C 2-stroke.
Bits are still available.

An engine swap would be the last thing to do - for the simple
reason that the engine mounts are unique to this engine.
You would need to modify the base mounts to accommodate a modern 4-stroke.

A 4-stroke will not bolt on; neither will any other 2-stroke in any simple way.
It would be a shame to lose that connection - between mower and original engine.
That is a personal view.

If you know engine theory, and the engine has compression and spark,
then the fuel mix must be fresh. It is possible that the engine is miss-timed.

There are videos on YouTube to time the 25C.

Hope this helps.
-----------------------------
Jack


Last edited by CyberJack; 07/01/18 08:45 PM. Reason: Added thoughts.
Joined: Aug 2011
Posts: 2,998
Likes: 16
Former Moderator
Hi Aiden,

You could do an engine swap but you can only use an engine that has a 5/8 PTO shaft coming out of the crankcase. The bigger Honda's and Chonda's have all got 3/4 inch (19mm) PTO shafts which is too big to suit the counter weighted sprocket.


Cheers,
BB.


I live a 24 Hour lifestyle, but every now and again I seem to fall asleep, well at least that's what my wife tells me.
Joined: May 2017
Posts: 131
Apprentice level 2
Yeah the Villiers are a pretty hardy engine, not much to go wrong. I'd be checking the usuals first
New spark plug
Confirm coil is in good shape
New fuel
Carby is clean/ operating

Get back to us

Joined: Jan 2016
Posts: 8,176
Likes: 232
SENIOR TECHNICIAN
With the original engine up and running it is a far more interesting machine with than one with a modern chonda motor fitted, it looses all its heritage then.

Joined: Aug 2011
Posts: 2,998
Likes: 16
Former Moderator
Hi guys,

Couldn't agree more with you Norm, thus why I originally suggested in a PM to Aiden that it should only require a fuel system service as it has both spark and compression and with it being a 2 stroke it will probably require a full chemical cleaning of residual 2 stroke oil that has congealed in the carburetor, thus blocking the supply of fuel.

Cheers,
BB.


I live a 24 Hour lifestyle, but every now and again I seem to fall asleep, well at least that's what my wife tells me.

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