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Engine basics => Engine set up tips => Topic started by: frank mccune on June 02, 2013, 07:37:21 AM

Title: Enya crankcase-front end compatibility?
Post by: frank mccune on June 02, 2013, 07:37:21 AM

     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

Title: Re: Enya crankcase-front end compatibility?
Post by: RandySmith on June 02, 2013, 01:36:00 PM

Quote from: frank mccune on June 02, 2013, 07:37:21 AM

     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

Title: Re: Enya crankcase-front end compatibility?
Post by: Chris Wilson on June 02, 2013, 04:30:04 PM

Quote from: RandySmith on June 02, 2013, 01:36:00 PM

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.

Title: Re: Enya crankcase-front end compatibility?
Post by: frank mccune on June 03, 2013, 06:39:28 AM

       Hi:

        Perhaps I was a bit vague when I suggested that I had swapped .19 and .35 Enya parts.

        I swapped .19 front ends with .19 crankcases and .35 front ends with .35 crankcases.  I hope that nobody thought that I had swapped .19 parts with .35 parts! Lol This prompted my question as to what Enya parts will interchange.

        In any case, I went through my "junk" box and found parts to assemble a complete .19 engine and a complete .35 engine. Bench ran both and they appear to to be running very well!

                                                                                                         Frank

Title: Re: Enya crankcase-front end compatibility?
Post by: Steve Helmick on June 03, 2013, 12:29:38 PM

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.  H^^ Steve