You have an O.S. Max .61 RF-P engine. It's the same as the .61 SF-P as far as operation is concerned. It was from the production series prior to the .61 FX engine.

If you send an email to the address below, requesting instructions for the .61 SF/RF pumped engine, and for the pump and carb instructions to go with it, we should have no problems getting them to you.