I have a YS 120F That belonged to my father. Does anyone out there have a manual for this engine that I could get a copy of. Any info would be appreciated. I was told that Central Hobbies is a good source for parts but they do not list parts for the "F" engine. Are they interchangable with the other 120's in the line up? This engine sat dormant for about 6 years should I replace the pump diaphram? Again any info would be very helpful. Thank you.

James