Engines |
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| Q: | ENGINE WILL NOT START OR STARTS BUT THEN STOPS |
| A: | 1. Check there is sufficient fuel in the tank. 2. Check the oil level (the oil alert will stop the engine if it is too low or the engine is on too great an angle) 3. check the on/off switch is set to ON. 4. Check there is no foreign matter (particularly water) in the carburettor 5. If the engine will only run smoothly on part choke, it is usually that the main jet is partially blocked due to stale fuel residue or water deposit. |
| Q: | HOW DO I KEEP THE DUST FROM MY AIRCLEANER? |
| A: | Important: only genuine air cleaner parts get the best out of your engine! When replacing the SUBARU cyclonic-aircleaner element, a smear of grease around the entire circular base makes the perfect dust-proof seal. Remember to clean the dirty grease build up from the air horn during the next scheduled service. |
| Q: | HOW DO I SET THE TIMING ON EX ENGINES |
| A: | Align gold links on timing chain with timing dots on cam gear and crankgear. |
| Q: | HOW OFTEN SHOULD I CHANGE THE OIL ON MY SUBARU DIESEL ENGINES? |
| A: | DY23 and DY27: Although the owner's handbook specifies no oil change is required before 100 hours of running time has occurred, it is preferable to change the oil at 50 hour intervals. DY30,DY41 AND DY42 The owner's handbook specifies changing the oil at 50 hours and this is sufficient. NOTE: On all models, it is imperative to change the oil at regular intervals, plus clean the filters. |
| Q: | HOW OFTEN SHOULD I CHECK THE OIL LEVEL ON MY NEW ENGINE? |
| A: | Regardless of make, model or size of engine, it is imperative that the oil level be checked frequently, e.g. after every tank full of fuel until the motor has properly bedded rings to cylinder. This is even if the motor has a sensor unit, as the location or angle of the machine can cause false readings. |
| Q: | OIL FOR EH025 AND EH035 SERIES |
| A: | Used on brushcutters, blowers, blower vacs, portable vibe shafts. The owners manual suggests 10w-30 oil. Unfortunately weather temperatures above 20 degrees can cause excess oil in the air filter of these engines. We suggest (as per the service manual) that 30 grade mono be used consistently. |
| Q: | REASONS FOR CARBURETTOR FLOODING? |
| A: | 1. Air vent hole blocked (common on drive units, cement covering carburettor) 2. Foreign matter in carby (make sure tank and filters are kept clean) 3. Pin hole in float 4. Float jammed on stem of carby 5. Incorrect float level NOTE: As all new carburettors are fitted with Neoprene tipped float needles, most flooding problems are caused by numbers 1 and 2 above. When removing float pin, use caution - one end is flat to lock in the leg. This must be pushed away from the centre. |
| Q: | RESTRICTOR ON ENGINES |
| A: | Most small engines such as SUBARU, Honda, Briggs & Stratton, etc. when fitted with a Donaldson or similar type of air cleaner, require some sort of restrictor to prevent the engine hunting. When replacing any part of the intake system make sure the restrictor is fitted. (An exception to this is the SUBARU EH41 and SUBARU twin cylinder motors as they do not need restrictors. |
| Q: | STICKY INTAKE VALVE - DON'T GET STUNG! |
| A: | There are often reports of wasps building nests in the exhausts of small engines. The symptoms indicate a sticky intake valve, whereas it is actually the muffler that is blocked. Usually this problem is usually after a long storage period, though in one instance the muffler blocked over a weekend. |
| Q: | WHAT ARE THE CORRECT TERMINALS FOR CONNECTING BATTERIES TO AN ELECTRIC START MOTOR? |
| A: | The RED WIRE POSITIVE (+) is connected to the POSITIVE (+) terminal of the battery. The BLACK WIRE NEGATIVE (-) is connected to the NEGATIVE (-) battery terminal. |
| Q: | WHAT IS AN OVERHEAD CAM? |
| A: | (OHC) A Camshaft Mounted above the Head to Activate the Valves is driven by a timing (cam) chain. Direct valve activation by a cam eliminates the need of pushrods and rocker arms, and their accompanying lash and inertia. Valves respond quicker, valve adjustment can be more accurate, and engine speed can be higher. OHC Engines Offer Mechanical Advantages over Comparable Size Pushrod Engines: |
| Q: | WHAT IS AN OVERHEAD VALVE? |
| A: | (OHV) Valves Located in the Cylinder Head. Valve actuation is via pushrod and rocker arm. In a four-stroke engine, the intake and exhaust valves are in the cylinder head. The valve stems are either at an angle or parallel, and the valve discs face the piston. |
| Q: | WHAT IS THE BEST OIL FOR 4-STROKE SUBARU ENGINES? |
| A: | The best engine oil for your petrol-powered, 4-stroke SUBARU engine is a high-quality, mono-grade 30W oil and NOT a multi-grade. The rings on new engines will not bed properly if a multi-grade oil is used - you will just end up with a beautifully glazed bore! |
| Q: | WHAT IS THE BEST WAY TO STORE SMALL ENGINES FOR WINTER? |
| A: | 1. Drain fuel from tank and carburettor 2. Remove spark plug and squirt a small amount of engine oil into the cylinder 3. Replace plug and wind motor over 2 or 3 times 4. Bring the piston up on compression stroke. (If in damp conditions, put tape over the intake and exhaust and give unit a light spray with a mix of diesoline and oil or similar.) |
| Q: | WHAT IS THE CAUSE OF ENGINES 'HUNTING'? |
| A: | The most common cause of engines ‘hunting or surging’ is stale fuel evaporating, leaving residue on the main jet or dirty fuel causing partial blockage of the jet. If the motor runs smoothly on partial choke, this usually indicates main jet restriction. **Other causes can be worn or cracked carburettor insulators or poor sealing gaskets. If the carburettor is damaged on the right hand side near the blower housing this will cause the engine to hunt or suge as it will provide increased air flow across the back of the carburettor vent which will upset the fuel level. In this instance a replacement of the insulator will be necessary. |
| Q: | WHICH OIL SHOULD I USE FOR THE SUBARU EH025 & EHO35 SERIES ENGINES? |
| A: | These engines are used on brushcutters, blowers, blower vacs and portable vibrator shafts. The owners manual suggests 10w-30 oil. Unfortunately weather temperatures above 20 degrees can cause excess oil in the air filter of these engines. We suggest (as per the service manual) that 30 grade mono be used consistently. |
| Q: | WHY IS FUEL LEAKING INTO ENGINE CRANKCASE |
| A: | When experiencing fuel in the oil of engines the first step is to check the needle and seat are in good condition. Often leaking can be caused by the fuel tank cap vents being blocked – or in extreme cases, by the tank being fitted with a non-spill cap. |
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Generators |
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| Q: | CAN I RUN MY GENERATOR AT LOWER SPEED TO CONSERVE FUEL? |
| A: | The power supply required to operate Australian appliances is 240 volts. If the set speed is reduced the voltage is reduced proportionally and can result in damage to the appliance. |
| Q: | My Inverter Generator is running rough, running for short periods then stopping and it's voltage drops after a short period of time. |
| A: | Possibly the Spark Plug requires replacement. We recommend keeping with the original NGK plug. Inverter Generators require resistor type spark plug. The use of a non-resistor type plug will case the generator to malfunction. |
| Q: | WHAT TYPE OF SPARK PLUGS SHOULD I USE FOR MY SUBARU INVERTER GENERATOR? |
| A: | When fitting or changing spark plugs in SUBARU Inverter type generators a resistor type spark plug must be used. Use of a non-resistor type plug will case the generator to malfunction. |
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Pumps |
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| Q: | THE DY23/27 POWERING MY WATER PUMP IS HARD TO TURN OVER |
| A: | These engines fitted to water pumps that experience heavy and consistent use may become hard to turn over. One cause of this is wear to the crankshaft thrust bearing. Check this by measuring the end float of the crank, it should be .004TH - .012TH (.1 - .3 mm). If it exceeds these specifications, replace the thrust washer. |
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