Maintenance, Lehr – LEHR 9.9 HP 4-STROKE User Manual

Page 19

LEHR

ADJUSTING IDLING SPEED

WARNING: Do not touch or remove electrical parts when starting or during operation. Keep hands, hair, and
clothes away from the flywheel and other rotating parts while the engine is running.

CAUTION: This procedure must be performed while the outboard motor is in the water. A flushing attachment
or test tank can be used.

NOTE: A diagnostic tachometer should be used for this procedure. Results may vary depending on whether
testing is conducted with the flushing attachment, in a test tank, or with the outboard motor in the
water.
1. Start the engine and allow it to warm up fully in neutral until it is running smoothly.
NOTE: Correct idling speed inspection is only possible if the engine is fully warmed up. If not warmed up
fully, the idle speed will measure higher than normal. If you have difficulty verifying the idle speed,
or the idle speed requires adjustment, consult a LEHR dealer or other qualified mechanic.
2. Verify whether the idle speed is set to specification (1050 + 150 RPM). Adjust the speed by turning the
idle speed screw with a phillips head screw driver.

CHANGING ENGINE OIL

WARNING: Avoid draining the engine oil immediately after stopping the engine. The oil is hot and should
be handled with care to avoid burns.

• e sure the outboard motor is securely fastened to the transom or a stable stand.
• o not o erfill the oil, and be sure the outboard motor is upright (not tilted) when chec ing and changing
the engine oil.
• If the oil le el is abo e the upper le el mar , drain until the le el meets the specified capacity.

erfilling

the oil could cause leakage or damage.
• hange the engine oil after the first 1 hours of operation, and e ery 1

hours or at 6 month inter als

thereafter. Otherwise the engine will wear quickly.

NOTE: Change the engine oil when the oil is still warm.

1. Put the outboard motor in an upright position (not tilted).
2. Prepare a suitable container that holds a larger amount than the engine oil capacity. Loosen and remove
the drain plug while holding the container under the drain hole. The oil drain plug is located on the
tiller side of the engine. Use a 12 mm socket wrench. Then remove the oil fill cap. Let the oil drain
completely. Wipe up any spilled oil immediately.
3. Put a new gasket on the oil drain plug. Apply a light coat of oil to the gasket and install the drain screw.

NOTE: If a torque wrench is not available when you are installing the drain screw, finger tighten the screw
just until the gasket comes in contact with the surface of the drain hole. Then tighten 1/4 to 1/2 turn
more. Tighten the drain screw to the correct torque with a torque wrench as soon as possible.
4. Add the correct amount of oil through the filler hole. Install the filler cap.

MAINTENANCE

IDLE SPEED SCREW

OIL DRAIN PLUG

TORQUE TO 10 ft-lb (13.6 N-m)

CARBURETOR

NOTE: Inspect the following for any source of a fuel leak. A propane sniffing device may be used to inspect.
• uel system parts lea age
• uel line oint lea age
• uel line crac s or other damage
• uel connector lea age

OIL FILL CAP