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QT-16 Safety and Operation Instruction

Page 18

MAINTENANCE (continued)

thoroughly. Distribute three tablespoons of SAE 30 engine oil evenly around the precleaner. Knead this oil into the precleaner and wring out the excess oil. Wipe dirt or dirt accumulation from air cleaner cover and base. Reposition precleaner around the dry element and reassemble the air cleaner.

NOTE

The dry paper element should be replaced whenever it becomes excessively dirty.

CAUTION

NEVER RUN THE ENGINE WITH AIR CLEANER REMOVED, DIRT WILL ENTER THE ENGINE AND SCORE THE CYLINDERS.

 

The importance of maintaining an air cleaner in proper condition cannot be over-emphasized! Improper air cleaner maintenance can create engine damage which the engine manufacturer will not warrant.

CARBURETOR (Figure 22)
The carburetor has a main fuel (high speed) adjustment (J) and an idle fuel adjustment (K). The main adjustment affects operation under high engine speed conditions. Idle adjustment (K) affects operation at idle or low speed conditions.

 

Under normal circumstances, factory carburetor adjustments should not be disturbed. If the adjustments have been disturbed, turn the needles lightly to their seats, then turn needles off their seats 1 to 1-1 /8 turns to permit starting. Readjust for smooth operation. Engine idle speed is 1900 + or - 50 RPM.

NOTE
Heat shield must be removed to adjust carburetor on units so equipped.

CAUTION

FORCING THE NEEDLE AGAINST ITS SEAT WILL DAMAGE IT. THE NEEDLE DOES NOT COMPLETELY SHUT OFF FUEL WHEN TURNED FULLY IN.

Before final adjustment, allow the engine to warm up. Make the idle adjustment (L) under no load. Set the engine idle speed at 1900 RPM. Open the main jet (J) until the engine runs smooth under acceleration with no load. Slightly more fuel may be needed (open about 1/4 turn further) when sudden load is applied.

Set the throttle stop screw (located on carburetor throttle lever) with no load connected and while running at a low speed setting. Turn the screw to give approximately 1/32 inch (.73mm) clearance between the screw and pin at idle.

If engine develops a "hunting" condition (alternate increase and decrease of engine speed), try correcting by opening the main adjusting needle a little more. Do not open more than 1 /2 turn beyond the maximum point of power.

 

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