R.M.P marine engine informatin help

hi guys i have found a R.M.P inboard engine i would like to buy but i cant find any informatin about it hopeing you guys can help.
it is made by R.M.Parkinson ltd cheltenham.
model: minor
type: 1123NC i think its a N or might be M hard to see.
mark: 111
ser no : 200012

i would be referbishing it. it looks quite old. luckely the pistion still moves and the gear box still terns.
any information about the engine would be great thanks .

Hi and a warm welcome to the forum.
Not an engine I'm familiar with, but hopefully someone will be able to help. Good luck.

Information available online can be thin for odd small engines, you could try a post here: http://www.oldmarineengine.com/cgi-bin/discus/discus.cgi?pg=topics.
Or a letter to Stationary Engine Magazine may jog the memories of some stalwarts who are not on the web.

I posted some information for you on your FB request about this marine engine, but you didn't reply.