A Stuart Williamson build

[Jasonb]

I've undone Mamod belts too, just twist them the opposite way and they should inscrew.

As Sanjay found out it is only the washers that should be soldered to the pin, the two small jockey wheels should be free to rotate independantly.

[Sedbergh41]

All the pulleys are free moving. I suspect I may have made the belt too short and tight. However I have not been able to unscrew the Mamod belt once joined. Anyway I have ordered ten more. Thanks for the help.

[Sedbergh41]

Governor brackets came from Model Engineers Laser and all assembled. Photograph of trial assembly. Some final fettling needed.

[Sanjay F]

Very nice, you've gone for black in the flutes too? 

[Sedbergh41]

Thats part of the final fettling. I have only sanded off the black on that side but it looks good. Also still have to sort out the drive pulley to the governor. I think I will make a new one out of steel. Finally I seem to have a leak on the cylinder head gasket to sort out. Thanks for the great advice.

[Sanjay F]

I have just noticed something on your engine which I encountered and corrected (see photo). If you look at the angle of your drive belt its angled downwards from the governor so what I did make a spacer to make it horizontal (see 2nd photo). I'm not sure if this is causing the issue you are experiencing but worth taking a look?

[Sedbergh41]

Sanjay. I solved the slipping belt problem by making a new drive pulley from steel being very accurate on the shape and size of the belt groove. I then had a real battle getting the valve timing right as I had chosen not to drill holes in the column for the lower valve chest cover bolts. Finally got it right and it is running quite sweetly. Just need to prepare and fix the nameplate and i will post a video.

[Sanjay F]

That's really good to hear, I'm glad you got it sorted. I decided not to drill the holes in the column too, I didn't really see the value of it as once the timing is sorted not really a great need to be remove it on a model engine! Looking forward to seeing the final result.......

[Sedbergh41]

Photo of finished model as promised

[ShopShoe]

That's a beautiful model.

You did very well!

Thank You for posting.

ShopShoe

[Sanjay F]

Well done, you got there in the end 👍

[propforward]

A beauty! Very well done indeed. 👍👍