Understanding the fuel supply/lines JLO 2 stroke

[brxl]

Hello,
When looking at the attex shop manual (-47), it appears the fuel is gravity feed from the tank then to the fuel switch (which is like a fluid valve?) and via fuel filter to the underside of the (mikuni) carburator?
However, there is a similar diameter connector coming from the JLO engine's crankcase, so I wonder how the complete setup of fuel lines looks like?
Thanks in advance,
brxl

[Don]

Hey, B;
The Mikuni carburetor they used on the JLO requires an external fuel pump. The fitting into the crankcase is a pulse line that powers the pump. Nachman 07-187-01 Mikuni DF44 Single Outlet Fuel Pump For Honda Snowmobile Many | eBay Here's a link to a cheap one on ebay. The round type pumps seem to last longer but they're a little more expensive.

Good Luck
Don

[brxl]

Thank you very much, anything particular about the location (close to the carb ?)?
Cheers
brxl

[Don]

Yes; close the the carb, keeping the pulse line as short as possible is about the best way to do it IMO.

[wedge]

As Don said Keep the Pulse line as short as you can. To long and it loses signal (pulse) from the crank case.