Hi:

      I would like to know if the various Enya crankcases and front ends are interchangeable.  I am speaking about the older engines that were plain bearing sport engines.

      I have mixed a .19 and a .35 crankcases and front ends to make engines that appear to run very well.  Will all of these engines parts interchange? If so, which ones will not?

                                                                                            Tia,

                                                                                            Frank

The older  29 and 35 are the  same, the 45 is different, I did not know the 19 was the same part?

Randy

Hi Randy,
               I am guessing that 'interchangeability' does not equate to being the same.

I don't know a lot about Enya engines, but I thought it very odd that the Mk.V and Mk.VI .19's have different mounting bolt patterns. But unless there was a profound flaw in the lower end/front end of the earlier version, it wouldn't surprise me if they would interchange, either. 

Seldom does an engine manufacturer start with a blank sheet of paper, and whether designed in inch or metric, there is a strong tendency to use common bolt circles, bores/strokes, etc. Examples are strange...some ST G.21 .46 parts interchange with Enya .45 parts. Rossi .15/Cox Conquest .15/Taipan 2.5 rear exhaust hybrids abound, etc. A bit more involved were K&B Series '61/ST .29 "Rattler" hybrids, but they worked pretty well for some.  Steve