RedMax G5300 Owners Manual - Page 30

MAINTENANCE General The user must only carry out the maintenance and service work described in this manual. IMPORTANT! Any maintenance other than that described in this manual must be carried out by your servicing dealer (retailer). Carburetor adjustment Every unit is run at the factory and the carburetor is set in compliance with emission regulations. Therefore the chain saw is equipped with movement limiters on the carburetor adjustment screws, that limit the adjustment possibilities to a maximum of a 1/2 turn. L H 1/2 1/2 Your RedMax product has been designed and manufactured to specifications that reduce harmful emissions. Function • The carburetor governs the engine's speed via the throttle control. Air and fuel are mixed in the carburetor. The air/fuel mixture is adjustable. Correct adjustment is essential to get the best performance from the machine. • The satisfactory operation of a catalytic converter depends, among other factors, on the correct adjustment of the carburetor. Carefully follow the instructions below, using a tachometer as an aid. • The setting of the carburetor means that the engine is adapted to local conditions, for example, the climate, altitude, fuel and the type of 2-stroke oil. • The carburetor has three adjustment controls: - L = Low speed jet - H = High speed jet - T = Idle adjustment screw L H Basic settings and running in The basic carburetor settings are adjusted during testing at the factory. Avoid running at a too high speed for extended periods during the first 10 hours. CAUTION! If the chain rotates while idling the T-screw must be turned anti-clockwise until the chain stops. Rec. idle speed: 2700 rpm Fine adjustment When the machine has been "run-in" the carburetor should be finely adjusted. The fine adjustment should be carried out by a qualified person. First adjust the Ljet, then the idling screw T and then the H-jet. Conditions • Before any adjustments are made, make sure the air filter and spark arrestor screen are clean (if not, replace them) and the cylinder cover fitted. Adjusting the carburettor while a dirty air filter is in use will result in a leaner mixture next time the filter is cleaned. This can give rise to serious engine damage. • Do not attempt to adjust the L and H jets beyond either stop as this could cause damage. • Make sure the bar and chain are properly adjusted. • Now start the machine according to the starting instructions and let it warm up for 10 minutes. • Place the machine on a flat surface so that the bar points away from you and so that the bar and chain do not come into contact with the surface or other objects. Low speed jet L Turn the high speed jet H counterclockwise to stop. Then turn low speed jet L midway between full clockwise stop and full counterclockwise stop. Adjusting the idle speed • Start engine, turn idle speed adjustment screw clockwise until the chain starts to rotate, then turn screw out counterclockwise until the the chain stops. Turn screw out counterclockwise an additional 1/4 turn. WARNING! Contact your servicing ! dealer, if the idle speed setting cannot be adjusted so that the chain stops at idle. Do not use the chain saw until it has been properly adjusted or repaired. T • The L and H-jets are used to adjust the supply of fuel to match the rate that air is admitted, which is controlled with the throttle. If they are screwed clockwise the air/fuel ratio becomes leaner (less fuel) and if they are turned anti-clockwise the ratio becomes richer (more fuel). • The T-screw regulates the throttle setting at idle speed. If the T-screw is turned clockwise this gives a higher idle speed; turning it anti-clockwise gives a lower idle speed. 30 - English • Accelerate to full throttle for 2-3 seconds to clear any excess fuel in the engine, then return to idle. Accelerate engine to full throttle to check for smooth transition from idle to high speed. If engine hesitates, turn low speed jet L counterclockwise 1/8 turn and repeat acceleration. Continue adjustment until smooth acceleration results. • Check idle speed and reset if necessary as descibed above. If a tachometer is available, idle speed should be set to 2700 rpm. CAUTION! The idle speed adjuster screw should be adjusted to not rotate the chain when starting the machine. Correst idle speed is adjusted to 2700 rpm. Contact your servicing dealer when you experience trouble with the carburetor.