Bombardier-Rotax FR 125 MAX FR 125 Junior MAX Installation And Operator's Manual page 85

Operating Instructions FR 125 MAX, FR 125 Junior MAX and FR 125 Mini MAX
Note: The fuel filter (30) is located below the fuel inlet on the carburetor, preventing
contamination from entering the carburetor which could impair operation of the
carburetor.
Attention: The fuel filter (30) must be inspected periodically and cleaned as required.
Remove the hex. screw (32) and gasket ring (31).
Pull out the fuel filter (30) and clean the filter and fuel inlet.
Refit the fuel filter (30), the gasket ring (31) and hex. screw (32).
Install the carburetor into a vertical position and tighten the two clamps on
carburetor flange and carburetor socket.
Connect the fuel hose to the inlet nipple of the carburetor.
Note: When trying to start the engine it will take a few seconds for the fuel pump to fill the
float chamber and for the engine to start.
Note: With the adjustment screw (34), the idle speed of the engine can be adjusted. By
turning in the adjustment screw (34) the idle speed increases and by turning out this
screw (34) the idle speed will be reduced.
Note: With the adjustment screw (29), the fuel mixture formation can be adjusted. By
turning in the adjustment screw (29), the air-fuel mixture will become richer at idling
and by turning out this screw (29), the air-fuel mixture will become leaner at idling.
For better understanding and as help for carburetor adjustment the following sketch describes the
effect of various adjustments, depending on throttle position.
AIR SCREW AND PILOT JET
TYPE / POSITION OF JET NEEDLE
TYPE OF NEEDLE JET
MAINJET
Seite/page 85/108
FULL THROTTLE
3/4
1/2
1/4
1/8
IDLE
Ausgabe/edition 09.2003