FOR TROUBLE FREE OPERATION
- DO NOT run engine at full speed until thoroughly warmed up.
- DO NOT lift strainer out of the water while pump is operating.
- DO NOT run engine with pump disconnected.
- DO NOT run pump when dry.
- Check strainer frequently to make sure that it is not clogged with moss, leaves, etc.
- DO NOT use suction hose without foot valve strainer.
- Remove and drain pump after final use.
The starter is an automatic rewind type. A proper operating technique will add many hours of life to the starter rope and starter.
Grasp handle firmly and pull slowly until resistance (past compression), then continue to pull with a short, vigorous stroke. Pulling handle sideways causes excessive wear. If kickback occurs, let go of handle immediately.
When engine starts, retain grip on handle and allow rope to rewind slowly. Note: The rope should be replaced when wear is apparent.
OIL: High quality 2-cycle mixing oil.
FUEL: 87 Octane or higher automotive gasoline.
DO NOT use premium grade gasoline.
Do not use poor quality oil, high detergent oil or oil with solid additives (graphite, moly, T.F.E., etc.).
There are only 4 controls which are used for normal operation: (1.4)
- ON/OFF switch
- Throttle lever
- Choke lever
- Reset lever
TO START MARK-3 UNIT
- Connect fuel supply line to fuel supply tank (1.5).
- Attach fuel supply line to the adaptor located on right side of engine frame. Pump fuel to fill supply line (1.6). DO NOT use suction hose without foot valve strainer. DO NOT allow foot valve strainer to rest on bottom of lake or river bed.
- Connect foot valve strainer to male end of suction hose, then fill suction hose with water and connect to pump. Use universal hose coupling wrench to tighten coupling firmly (1.8).
- Connect discharge hose, nozzles, etc., to pump. Use a rope or other means to keep strainer at proper height, approximately 30cm (1 foot) below water surface. If strainer is too close to the water surface, it will draw air and pump may lose prime (1.7).
- Fill pump with water manually or using a hand primer (B-5980), then replace priming cap and tighten firmly (1.8).
- Move throttle lever to “Start” and “Warm up” position. Verify that On/Off switch is on “On” position (approx. 3 increments). Verify that the reset cutout switch is not engaged (must be pushed in).
- Close choke, if engine is cold.
- Slowly turn engine until resistance (past compression).
- Give starter rope several quick, steady pulls until engine “coughs”.
- Open choke slightly and pull starter rope until engine runs.
- Slowly open choke and allow engine to warm up for at least 2 minutes before using full throttle.
The MARK-3 engine was initially run-in at the factory. Full throttle operation can be used provided the engine is given a thorough warm-up period beforehand.
Important: Failure to allow the engine to warm up may lead to piston scoring and possibly more serious damage.
AUTOMATIC CUTOUT SWITCH
The MARK-3 unit is equipped with an automatic cutout switch. This safety device will stop the engine instantly and thereby eliminate overspeeding.
The switch works on cooling fan air pressure. As the engine speed increases, so does the air pressure. At a predetermined speed, there is sufficient air pressure to cause the air vane to move against its contacts, shorting the ignition and thereby stopping the engine.
TO STOP MARK-3 UNIT:
- Move throttle lever to “Stop” position.
- Allow unit to run for approximately 1 minute with throttle in this position.
- Switch toggle to “Off” position.
- Remove and drain pump after final use.
Since the introduction of the MARK-3 fire pump into the industry, the MARK-3 utilized breaker points in its ignition system, which inherently required mainte- nance; i.e. the gap adjustment, points cleaned and/or completely changed.
The upgrade to the electronic ignition system will eliminate the need for regular maintenance associated with breaker points. The electronic ignition system uses a magnetic pickup located on the flywheel, which when passing over a certain point on the stator will induce a high voltage, therefore causing the spark plug to fire at the proper moment.
The electronic ignition module is equipped with spark advance, thus allowing for a cleaner burn at a higher RPM. During testing it was found that the engine ran smoother and was much more responsive. When the engine is started cold, it runs rough (as if the timing were off) for about 15-30 seconds, after which the engine runs smooth.
In order to convert a MARK-3 from breaker points to the upgraded electronic ignition system, the following retrofit kit was created: B-7595 MARK-3 Conversion kit, point to CDI.
The ignition cable is larger in diameter than the previous one used on the MARK-3 with breaker points.
The breakdown of the electronic ignition is depicted in the picture to the left. The electronic module is placed in an aluminium box located on the frame below the carburetor shroud.