Maintenance, High speed needle H | Jonsered GR 2126D specs

MAINTENANCE

Final setting of the idling speed T

Adjust the idling speed with the screw T, If it is necessary to readjust. First turn the idle speed adjusting screw T clockwise until the cutting attachment starts to rotate/ move.

Then turn, counter- clockwise until the cutting attachment stops. A correctly adjusted idle speed setting occurs when the engine runs smoothly in every position. It should also be good margin to the rpm when the cutting attachment starts to rotate/move.

CAUTION! Contact your servicing dealer, if the idle speed setting cannot be adjusted so that the cutting attachment stops. Do not use the machine until it has been properly adjusted or repaired.

	High speed needle H
	The high speed needle affects
	the machine’s power, speed,
	temperature and fuel
	consumption. A too lean
	adjustment on the high
	speed needle H (the high
	speed needle H is screwed in
	too much) gives a too high
	speed resulting in engine
	damage. Do not allow the
	engine to run at full speed
	for more than 10 seconds.
	Apply full throttle and turn
	the high speed needle H
	slowly anticlockwise until
	the engine runs unevenly.
	The high speed needle H is
	then turned slowly clockwise
	a little until the engine runs
	smoothly.
	Note the engine should be
	run unloaded when
	adjusting the high speed	H
	needle. Therefore dismantle	H
	needle. Therefore dismantle
	the cutting equipment, nut,
	support flange and disc drive
	before adjusting the high
	speed needle. The high speed

needle is adjusted correctly when the machine ‘splatters’ a little

. If the machine smokes heavily at the same time as it ‘splatters’ heavily the adjustment is too rich.

NOTE! For optimum setting of the carburettor, contact a qualified servicing dealer who has a revolution counter at his disposal.

Correctly adjusted carburettor

A correctly adjusted carburettor means that the machine accelerates without hesitation and the machine 4-cycles a little at max speed. Furthermore, the cutting attachment must not rotate/move at idling. A too lean adjusted low speed needle L may cause starting difficulties and bad acceleration.

A too lean adjusted high speed needle H gives lower power = less capacity, bad acceleration and/or damage to the engine. A too rich adjustment of the two speed needles L and H gives acceleration problems or too low working speed.

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