This document is an operation manual for a Mercury Marine 40-115 HP Tiller. It provides detailed instructions for using, adjusting, and maintaining the tiller handle, which is designed to control an outboard engine.
Function Description:
The Mercury Marine 40-115 HP Tiller serves as the primary interface for controlling an outboard engine, allowing the operator to steer, adjust speed, shift gears, and manage other engine functions. It is designed for ease of operation and durability, incorporating various features to enhance the boating experience. The tiller handle integrates several controls and indicators to provide comprehensive command over the outboard.
Important Technical Specifications:
- Engine Compatibility: Designed for Mercury Marine outboard engines ranging from 40 to 115 horsepower.
- Throttle Grip Rotation: Configurable for either counterclockwise (factory default) or clockwise rotation to increase speed.
- Tiller Handle Yaw Adjustment: Allows horizontal angle adjustment up to 18° left or right of center, with each marked increment representing 6°.
- Tiller Handle Tilt Friction Adjustment: Adjustable to control the effort required to move the tiller handle up and down. The jam nut for this adjustment requires a torque of 47.5 Nm (35 lb-ft).
- Clamp Nut Torque (Yaw Adjustment): 50 Nm (36.9 lb-ft).
- 6 mm Allen Socket Head Screw Torque (Yaw Adjustment): 24.4 Nm (18 lb-ft).
- Troll Control Speed Range:
- 35-60 hp FourStroke: 700-1000 RPM
- 75-115 hp FourStroke: 550-1000 RPM
- Heated Throttle Grip (if equipped): Features three heat settings (low, medium, high) indicated by LEDs, and automatically shuts off if battery charge is too low to preserve starting power.
Usage Features:
- Tiller Handle Components: Includes a tiller lock release lever, heated throttle grip control (if equipped), ignition key switch, lanyard stop switch, lanyard, throttle grip friction knob, troll speed control switch (if equipped), power trim switch (if equipped), throttle grip, gear shift handle, warning light panel, spare lanyard clip, down stop adjustment knob, and tiller handle tilt friction adjustment jam nut.
- Warning Light Panel: Located on top of the tiller handle, it features five translucent icons that illuminate to indicate unsafe conditions: Warning (engine fault), Battery (low voltage), Lanyard clip (removed), Oil pressure (below safe level), and Engine overheat (coolant temperature above safe level). Each icon has a corresponding action to take.
- Lanyard Stop Switch: A critical safety feature that stops the engine if the operator falls overboard or moves too far from the controls. The lanyard cord has clips for attachment to the stop switch and the operator's personal flotation device (PFD) or wrist. Operators are warned to always connect to the stop switch and to ensure the switch and cord are in good operating condition before each use.
- Throttle Grip Friction Adjustment: A knob allows the operator to increase or decrease the effort needed to rotate the throttle grip, helping maintain a desired speed.
- Throttle Grip Rotation Configuration: The throttle grip's rotation direction (clockwise or counterclockwise for increasing speed) can be reconfigured. This involves removing the top cover, adjusting a pin in the pinion gear, and reassembling.
- Tiller Handle Tilt Friction Adjustment: The pivot screw can be adjusted to control the resistance when tilting the tiller handle up or down.
- Tiller Handle Operating Position Adjustment: A down stop adjustment knob allows the operator to raise or lower the tiller handle's operating angle.
- Tiller Handle Yaw Adjustment: The horizontal angle of the tiller handle can be adjusted left or right of center to suit operator preference. This involves loosening a clamp nut and an Allen socket head screw, rotating the handle, and then re-tightening.
- Tiller Handle Tilt Lock: Allows the tiller handle to be tilted for convenient transportation, storage, or inclined operation. It ratchets through three inclined operating positions, including a fully raised "trailering" position.
- Gear Shifting: Provides three positions: forward (F), neutral (N), and reverse (R). Emphasizes shifting only at idle speed and with a quick motion.
- Troll Control (if equipped): Allows the operator to maintain a set trolling speed without using the throttle. Activated by pressing (+) or (-) buttons, and deactivated by rotating the throttle grip out of idle or moving the shift handle to neutral (on 75-115 hp models).
- Power Trim (if equipped): A switch on the end of the throttle grip allows adjustment of the outboard's angle relative to the boat transom.
- Ambidextrous Operation: The tiller handle can be configured for either right-hand or left-hand operation. The shift lever's position can be changed (requires authorized dealer service), and the throttle grip rotation direction can be reconfigured.
- Heated Throttle Grip (if equipped): Provides three heat settings for cold-weather comfort, controlled by a button at the pivot end of the tiller handle.
Maintenance Features:
- Pre-Starting Checklist: Reminds operators to read the pre-starting checklist and engine break-in procedure (if applicable) in the outboard operation manual.
- Inspection: Advises checking the tiller handle for loose fasteners or components and ensuring all adjustments are set to preference before starting the engine.
- Lanyard Cord Inspection: Before each use, visually inspect the lanyard cord for breaks, cuts, or wear, and check the condition of the clips. Replace damaged cords.
- Water Pump Indicator: Instructs operators to check for a steady stream of water from the water pump indicator hole after starting the engine. If no water flows, stop the engine and check for obstructions or internal blockages, and contact an authorized dealer if necessary.
- Dealer Service: Several procedures, such as shift lever configuration changes and addressing engine faults or cooling system issues, require service by an authorized Mercury Marine dealer.
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