OS61 Hanno Identification?
 

Hi, does anyone know if theres a way to tell the difference between a OS61RF Hanno Special MK1 and the MK2 version?
Externaly that is.

Thanks
Jason

RE: OS61 Hanno Identification?
 

Hello again Jason,
At my advanced age Hanno 61s were a long time ago,but I seem to remember that Mk2s were ringed(OK not a totally external sign), and Mk1s were not, but the (OS) piston had a little groove where you'd expect the ring to be.
I say OS piston because a lot of people changed to Nelson(Sometimes called Shadel) pistons and liners, either ABC or AAC.
Remember those LINES.
Regards,
Alan.

RE: OS61 Hanno Identification?
 

Thanks Alan and hope that premium bond win makes up for your loss last weekend!

Cheers
Jason

RE: OS61 Hanno Identification?
 

The most recognizable difference was the fuel pump design. The MK1 had a return line from the pump to the tank. The MK2 a simpler design with just a fuel line from tank to pump, and pump to carb

RE: OS61 Hanno Identification?
 

Thanks for the reply's
Are you sure about the pump on the Mark 1 hanno?
I know the predecessor to the Hanno Special, the OS 61RFP had the pump with the 4 nipples, 2 to the carb and 2 to the tanks...because ive still got one!

Rgds
Jason