SERVICE INFORMATIONSRM-5000
7
2 EMISSION ADJUSTMENT GUIDE
2-1 General adjusting rules
A. Before starting the unit for adjustment, check the following items.
1. The correct spark plug must be clean and properly gapped.
2. The air filter element must be clean and properly installed.
3. The muffler exhaust port must be clear of carbon.
4. The fuel lines, tank vent and fuel filter are in good condition and clear of debris.
5. The fuel is fresh ( > 89 octane : RON) and properly mixed at 50 : 1 with “ISO L-EGD” 2 stroke oil.
6. Two line nylon line head with properly cut lines is recommended to be installed for proper engine loading.
B. Start and run engine for 1 minute at idle speed, and then for 2 minutes alternating engine speed between
WOT for 20 seconds and idle for 10 seconds. Adjust idle speed screw to 2,500 +/- 100 r/min. If engine does
not run correctly after this adjustment, proceed to the next step 2-2.
IMPORTANT : After adjusting carburettor according to the steps 2-2 and 2-3, the limiter plug(s) must
be installed in Idle and H mixture needle(s) hole(s) to comply with Emission Directive.
2-2 Idle adjust screw, idle mixture needle and H mixture needle initial settings
1. Remove the plugs from idle mixture needle hole
(A) and H mixture needle hole (B) using limiter plug
tool (C) as follows.
(1)Put limiter plug tool (C) on limiter plug in mixture
needle hole.
(2)Screw limiter plug tool counterclockwise 2 turns
into limiter plug while pushing the tool.
(3)Pull out limiter plug tool with the limiter plug from
mixture needle hole.
(4)Repeat plug removal procedure for the other
mixture needle.
NOTE : When plug is damaged and left in the hole,
use needle or pin-shaped tool to scrape.
2. Turn idle adjust screw (D) anticlockwise until its
tip just toes throttle plate (E). Then turn it in clockwise
3 3/4 turns.
3. Turn idle mixture needle (C) anticlockwise to fully
come out until clicking sound is heard. Then turn it
clockwise 13 1/2 turns.
Turn H mixture needle (F) clockwise until lightly
seated. Then turn it anticlockwise 4 turns.
(B)
(A)
(D)
(E)
(C)
(F)
(C)
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