[charlie]

Good news, the magazines are in the post, my copy arrived today.

[charlie]

Is this the sort of unit?

Attachments:

1. 

[charlie]

The Howard Bantam had several different engines over the years. Early models had a Villiers Mk25c, later a Howard AC engine was fitted. Other engines included BSA, Villiers 4 stroke B&S etc.
A photograph of the engine on your machine will help identify it. A 2 stroke can usually be identified by the lack of any means of adding oil to the sump (crankcase) as petrol 2 strokes rely on the oil in the fuel mixture for lubrication.

[charlie]

The split pin is there to stop the rings turning in the groove. As a 2 stroke it is important that the ring gap does not line up with any of the ports in the cylinder bore, this could happen if the rings did not have the split pin to prevent then moving.

[charlie]

To remove gudgeon pin (wristpin) remove the clips part number 10297, see parts manual plate 2 for illustration.

[charlie]

Glad to know they could help, thanks for the update.

[charlie]

The break in the piston is probably where the broken ring came out. It would be worth cleaning the piston to see how bad the scoring is. You will need new piston rings, not sure if the break in the piston will cause ring failure again as ring will not be supported by groove in piston at that point.

[charlie]

Welcome to the club.
One possible source of piston rings is Cox and Turner Engineering

[charlie]

When the engine is running you should see the rear pto turning. With engine running when you pull on clutch lever the pto should stop. Note the series 3 Monrotiller has two levers that look like clutch levers, one is the clutch the other operates the reverse gear which is located on left hand side of gearbox towards the rear.
A workshop manual is not available for these machines but I do have operators manual which includes illustrated parts list. I have sent you a private message with my email address, if you want a copy of the manual please send me an email.
I also have the factory records and can date your machine from the machine number stamped on the makers plate, not the engine number.

[charlie]

Yes next magazine will be mid to late June so too late for you. An online auction would be your best option or maybe the Road Roller Association can help. It is certainly too good to scrap.

[charlie]

Any photos?

[charlie]

When I have stripped one of these engines the piston comes out via the bottom of the cylinder and goes back in the same way. There is a chamfer on the bottom of the cylinder to aid getting the piston rings and piston in. I don’t recall seeing a split pin but will have to look at an engine I have in bits at present. It could be the pin that stops the piston rings turning.
Do you have a copy of the parts book? If not I can supply a scanned copy, very useful for identifying parts.
The crank pin is held in by a tapered pin pressed into the end of the crank pin. Splitting the crank is not a job for the amateur as it requires a press and suitable tooling to remove the pin. Reassembly is even harder as it is critical to get all the parts correctly aligned. An engineering company specialising in motorcycle 2 stroke engines may be able to carry out the work.

[charlie]

John, please send details of roller and location along with contact telephone number to our editor for an advert to appear in our club magazine email editor at cultivator-editor@outlook.com

[charlie]

Glad to know you managed to get the flywheel off.
Removing the flywheel on the Simar does not affect the timing luckily. I do have the instructions for setting timing if needed. If you look carefully at the front face of the flywheel there should be a mark for TDC which lines up with the raised mark on the housing.

[charlie]

I don’t think the Allen Scythe ever had a rotavator attachment. Not sure if the Howard 350 had scythe attachment. Howard Bantam did.

[Author]

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