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PB-7910 H/T
7.
Install engine cover and attach spark plug lead.
8.
Start engine, and warm to operating temperature.
9.
Stop engine, and re-tighten mounting bolts (or nuts) to specifications.
Carburetor Adjustment
Engine Break-In
New engines must be operated a minimum duration of two tanks of fuel
break-in before carburetor adjustments can be made. During the break-in
period your engine performance will increase and exhaust emissions will
stabilize. Idle speed can be adjusted as required.
High Altitude Operation
This engine has been factory adjusted to maintain satisfactory starting,
emission, and durability performance up to 335 m (1,100 ft.) above sea
level. To maintain proper engine operation and emission compliance above
335 m (1,100 ft.) ASL the carburetor may need to be adjusted by an
authorized service dealer.
If the engine is adjusted for operation above 335 m (1,100 ft.) above
sea level, the carburetor must be re-adjusted when operating the
engine below 335 m (1,100 ft.) above sea level, otherwise severe
engine damage may result.
Level 2.
Parts required: None.
Note: Every unit is run at the factory and the carburetor is set in
compliance with emission regulations. Carburetor
adjustments, other than idle speed, must be performed by an
authorized dealer.
Idle Adjustment
Before adjustment make sure that:
• Air filter is clean and properly installed.
• Spark arrester screen and muffler are free of carbon.
• Blower pipes are installed.
1.
Start engine, run at idle for one minute.
X7501201800
© 10/23 ECHO Incorporated
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