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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

 

STARTING THE ENGINE

1. Have safety equipment on board and know how to use it.

2. Ventilate engine compartment by opening hatches.

3. Be sure engine compartment is thoroughly ventilated. (Run blowers for 4 minutes before starting engine, if installed.)

4. Turn blowers off after starting or before starting to eliminate excessive battery drain, if preferred.

5. Transmission lever should be in neutral. (Center Position)

6. Place throttle lever at 1/3 open position.

7. Turn key to "ON" position to energize fuel pump, glow plug and oil pressure light. If your panel uses a key switch start, go to 9.

8. Press "Glow Plug" button for 30 to 60 seconds, depending on the outside temperature.  Continue to hold glow plug button while pressing "Start" button to crank engine. Release both buttons immediately after engine starts. Go to 11.
NOTE: YOU MUST HOLD GLOW PLUG BUTTON IN TO ENERGIZE THE STARTER BUTTON FOR CRANKING ENGINE.

PANELS WITH KEY SWITCH START

9. Activate "Glow Plug" switch for 30 seconds to 1 minute, depending on the outside air temperature. It may be necessary to hold the glow plugs on during the time the engine is cranked in very cold outside temperatures.

10. Turn key to full "right" position to crank engine. Release key immediately after start. MAKE SURE THE KEY RETURNS TO THE "ON" POSITION.

NOTE: When cranking engine, only crank engine for 10 seconds and pause for 10 seconds. Repeat until engine starts. (See Caution printed on Starter Motor.)

11. Check oil pressure light. (Should go out after engine starts.)

12. Ammeter should indicate "Charge", depending on battery condition.

12A. If you have a voltmeter in place of an ammeter, it should read 12.5 to 14.5 volts, indicating alternator is working.

13. Check cooling system. (Make sure water pump is operating by checking for water coming out of exhaust pipe with exhaust gases.) Temperature on gauge should gradually increase to 165F to 195F on all models except M-15. Temperature on Model 15, should read between 135F and 155F.

14. If oil pressure light does not go out or no water overboard or temperature is not normal, STOP ENGINE AT ONCE! Recheck all items listed to correct problem.

15. If all indications are normal after start-up, continue to run engine for about 10 minutes to be sure all systems remain normal and operating temperature is maintained.

16. With boat still SECURED to mooring and throttle reduced to idle, check transmission operation by shifting from neutral to forward, to neutral, to reverse to neutral. Make sure no lines or obstructions are near the propeller.

17. Stop engine after above check out has been accomplished and recheck oil and water levels.

CAUTION:
COOLING SYSTEM IS UNDER PRESSURE AFTER OPERATION. REMOVE CAP
SLOWLY. COOLANT WILL BE VERY HOT, USE A RAG. YOU COULD GET BURNED.

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