Evinrude 25012 seems to be 1953-1954 & should mecanically very be close to its cousin rd15 or 16
there should be lots of similarities between them and the Johnson service manual AKA RED book bible should provide you with lots of info .
depending on the nature of what you need to fix the book should help sufficiently
if you visit
aomci ask a member you may be able to get a copy via file sharing service. then just print it locally and have it spring bound for easy flat reading 400+ pages covers just about all you need. see ex:
try this link...
Johnson Outboard Motor Service and Repair Manual # 302231 Tenth Edition covers all Models 1922-1964 .pdf download
watercraftmanuals.com
it is on EBay but a bit pricy .
