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Caution
General Information
Preparations For Starting
Before Starting
Starting Engine
Engine Break-in and General Running
Stopping the Engine
Decompression Lever
Instrument Panel
Wiring Diagram
Preparing Engine for Storage
Preparing Engine for Spring Service
Fuel Injection Timing
Diesel Valve Timing
Adjusting Fuel Timing
Decompression Device Adjustment
Fuel System
Fuel Bleeding
Oil Filter Change
Sea Water Pump and Impeller Replacement
Model 15 Sea Water Circulation Diagram
Model 12, 18, 20, 25, 25XP, 30, 40 & 50 Water
Fresh Water Circulation Diagram

Hurth Transmission
Periodic Service Chart for Engine
Marine Engine Warranty - Limited

Engine Specifications and Images
(by engine model)

M2-12
M3-20
M4-30
M-25XP
M-35
M-30
M-40
M-50
M-12
M-15
M-18
M-20
M-25

 

STOPPING THE ENGINE

1. Place throttle in the idle position.

2. Place transmission shift lever in neutral. (Center position).

3. Leave engine idle for approximately 1 to 2 minutes for it to cool down.

4. To stop engine on early Models 15, 18, 20, 30 & 40, hold throttle lever in the back position against the spring loading until the engine stops. Then release the throttle from the stop position and throttle will return to the idle position. Repeat if engine does not stop the first time. Models M-12, M-25, M2-12, M3-20, M4-30, M-25XP, M-35, M-40, M-50 have a separate stop lever for shutting the engine down. All newer models have a shut down lever on panel, pull
lever to stop engines, then turn off key. The newer models have a separate shut down lever.

5. Turn key to the "OFF" position to shut off the electric fuel pump and accessories. If not in "OFF" position, it may drain the batteries.

6. Open battery master switch ONLY AFTER ENGINE HAS COME TO A COMPLETE STOP! This will prevent alternator and regulator damage.

7. DO NOT USE THE DECOMPRESSION LEVER TO STOP THE ENGINE' This practice could seriously damage the exhaust valves.

8. You may want to close the fuel and sea water valves after stopping the engine. If so, BE SURE TO RE-OPEN THEM BEFORE RESTARTING. FAILURE TO DO SO COULD CAUSE ENGINE TO OVERHEAT AND DAMAGE TO THE PUMP IMPELLER, OR FUEL LINES TO BECOME AIR LOCKED. THIS SITUATION WOULD THEN REQUIRE BLEEDING OF THE FUEL SYSTEM BEFORE RESTARTING AND/OR REPLACING THE PUMP IMPELLER.
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