Ryan,


You did not mention is the engine is NIB, or used.

I must also know the 'model year', so to speak...
Does the carburettor on the engine have an elaborate intake 'trumpet', no idle stop screw, the idle needle has a full cross on its end and the prop driver is blue anodized?

...For most engines Morris offers the cheaper, extra shims "solution" to allow it it to use more readily available 10-15% nitro. Why don't you ask the original owner what he used, to get a better idea of what you are facing.

If the engine is 18 months old, or more, remove the head carefully (keep the sleeve aligned with the ports) and check if there is one head shim, or more.

Providing you can access 5% nitro fuel, one shim is all she wrote.


The original glow plug is/was a Novarossi 6. OS #8, Enya #3 and best of all K&B-1L will work great.

K&B is cheapest.