LEHR 2.5 HP 4-STROKE - Manual (Page 19)

IDLE SPEED
SCREW
CARBURETOR
SPARK ARESSTOR
(REAR VIEW OF ENGINE)
IDLE SCREW
ACCESS HOLE
OIL DRAIN PLUG
TORQUE TO 10 lb/ft (13.6 N-m)
NOTE: Inspect the following for any source of a fuel leak.
• Fuel system parts leakage
• Fuel line joint leakage
• Fuel line cracks or other damage
• Fuel connector leakage
(BOTTOM VIEW OF ENGINE)
LEHR | ALL RIGHTS RESERVED 2012-2013 17
ADUSTING 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 (2000 150 RPM). Adjust the speed by turning
the idle speed screw with a phillips head screwdriver. An access hole is provided in the rear lower cover
which allows a long screwdriver to be inserted into the idle speed screw at the proper angle. Remove the
rubber plug to use this hole.
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.
• Be sure the outboard motor is securely fastened to the transom or a stable stand.
• Do not overfill the oil, and be sure the outboard motor is upright (not tilted) when checking and changing
the engine oil.
• If the oil level is above the upper level mark, drain until the level meets the specified capacity. Overfilling
the oil could cause leakage or damage.
• Change the engine oil after the first 10 hours of operation, and every 100 hours or at 6 month intervals
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 oil drain plug while holding the container under the drain hole. The oil drain plug is located on the
3. Put a new gasket on the oil drain plug. Apply a light coat of oil to the gasket and install the drain plug.
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 plug 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 oil filler cap.
+
MAINTENANCE
bottom of the engine near the shift lever. Use a 10 mm socket wrench. Then remove the oil filler cap.
Let the oil drain completely. Wipe up any spilled oil immediately.