Errr.... it may be me but I thought that Rotax and Solo made separate engines, Rotax being a large Austrian company and Solo being very small offshoot of Dartford Karting's!
However, I may be wrong and perhaps Rotax did make a model called Solo of which I don't know
But, if I am right; what makes you think it's called a Rotax Solo? Is it cast into the engine or is there a plate? If it isn't, what IS cast into the motor or written on the plate?
Finally, if all else fails, take pictures of the motor from all angles and post it to a free picture site (Yahoo, Picasa, etc..); and publich the address of those picture in a further posting, here, listing a user name and password if the picture site uses one.
The plug choice depends on weather conditions and it is absolutely IMPERATIVE that you use the right one! Make the wrong choice and you will melt a hole in the top of a piston.... most of us Old Guys have done it at least once!
Ian
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