A slightly modified fuel system. Since the tank is located at the bottom of the housing, the supply of gasoline is carried out using a automotive fuel pump. But motorcycle carburetor K-37 is designed to feed it fuel by gravity. To forced feed from a pump is not called “transfusion” of the float chamber, is used intermediate the fuel tank, mounted directly on the engine. For this purpose, the preferred float chamber from the carburetor of any car: the valve will maintain the necessary level and to a working carb the fuel will go by gravity.
The drive pump is made as a separate unit installed on the front sub-frame. The stem of the diaphragm communicates with the eccentric shaft rotating in bearings of the casing V-belt drive from front of crankshaft pulley.
Battery ignition system replaced the magneto, installed at the place of the removed generator. The rotor drive — gear from camshaft.
As kickstarter engine start is inconvenient, you can use the manual start cord — like outboard motors. On the front end of the crankshaft pulley is installed, a large Creek which is used for start-up and small — to drive the fuel pump.
Figure 3. Drive fuel pump:
1, the starter pulley, 2 — motor, 3 — bearing engine, 4 — front sub-frame, 5 — elements of fastening of the drive body 6 bearing No. 201, 7 — sheave eccentric shaft, 8 — mounting elements, 9 — eccentric shaft, 10 — housing, 11 — V belt.
Fig. 4. The shaft Assembly propeller:
1— stud fastening Coca, 2 — COC (spinner) propeller, 3 — disk, 4 — bolts of the propeller, 3 — propeller, nut and washer in the hub of the propeller, 7 — key, 8 — the hub of the propeller, 9 — cover housing bearing Assembly, 10 — felt oil seal, 11 — ball bearing No. 206, 12 — distance sleeve, 13 — building, 14 — shaft, 15 — transitional flange case, a 16 — finger coupling shaft. 17 — rubber clutch, 18 — ring.
Fig. 5. Propeller.
Air two-bladed propeller is laminated from spruce and pine bars, and after machining are covered with nylon, painted with enamel and polished. Although the reduction of rotation frequency in the circuit is not provided, set the air screw on the shank of the crankshaft of the engine is undesirable, since the elements of the axial fixing of the crankshaft in the crankcase is not designed for high axial loads. Therefore, the propeller is mounted using a centering sleeve on an independent shaft mounted in the bearing Assembly. Chiseled aluminum case that node is fitted directly to the crankcase through the transition flange. Rotation with the flywheel of the motor shaft and the shaft of the propeller is transmitted to the finger coupling with the cushion plate covered by a stainless steel ring.
Management snowmobile — steering, the drive from the gas pedal to the carb, and the brake arm to the levers mounted on the rear ski — rope.
An essential element of the security of snowmobiles is a tubular protection of the propeller, which is attached to the underframe, and the top — directly to the engine. Two brace give the fence additional strength.
Comfort for the driver provides the windscreen, and in inclement weather a canvas awning pulled over the cab leans back on the two U-shaped frames.
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