1761 Mark-3 - Marine Electronics FURUNO - Free user manual and instructions
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| Product Type | Radar Display Unit |
| Brand | Furuno |
| Model | 1761 Mark-3 |
| Display Type | 7-inch monochrome CRT |
| Resolution | 480 x 640 pixels |
| Power Supply | 12-24 V DC (negative ground) |
| Power Consumption | Approx. 40 W |
| Dimensions (W x H x D) | 264 x 264 x 110 mm |
| Weight | 5.2 kg |
| Waterproof Rating | IPX6 (splash-proof) |
| Operating Temperature | -10°C to +55°C |
| Range Scales | 0.125 to 72 nautical miles |
| Antenna Unit | RSB-0071 (1.8 ft radome) |
| Output Power | 4 kW (peak) |
| Frequency | X-band (9410 ±30 MHz) |
| Bearing Accuracy | ±1° within 5° of ship's heading |
| Range Accuracy | ±1% of range scale |
| Minimum Range | 35 meters |
| Display Modes | Head-up, Course-up, North-up |
| Interface | NMEA 0183 for external data |
| Mounting | Tabletop or flush mount |
| Maintenance | Clean with soft, damp cloth; avoid solvents |
| Safety | Use specified fuse (3A, 32V); disconnect power before cleaning |
| Spare Parts | Contact authorized Furuno dealer |
| Repairability | Service by qualified technician only |
Frequently Asked Questions - 1761 Mark-3 FURUNO
How do I clean the screen of the Furuno 1761 Mark-3?
Use a soft, lint-free cloth slightly dampened with water. Avoid using alcohol or any abrasive cleaners to prevent damage to the anti-glare coating.
What is the power requirement for the 1761 Mark-3?
The unit requires a 12-24 V DC power supply (negative ground). It consumes approximately 40 W. Always ensure a stable power source and use the recommended fuse (3A, 32V).
How do I change the display range scale?
Press the RANGE key repeatedly to cycle through available range scales from 0.125 to 72 nautical miles. The current range is displayed on the screen.
What should I do if the radar does not power on?
First check the power cable connections and ensure the boat's battery is charged. Verify the fuse is intact. If the problem persists, consult a qualified technician.
Can I interface the 1761 Mark-3 with a GPS?
Yes, the unit supports NMEA 0183 input. Connect the GPS output to the appropriate terminals for position data and waypoint navigation.
How often should I perform maintenance on the radar antenna?
Inspect the radome and rotating assembly every 6 months. Clean the radome with freshwater and a soft cloth. Lubricate the drive gears as per the manual schedule.
What is the minimum range detection of this radar?
The minimum range is approximately 35 meters. Objects closer than this may not be displayed clearly due to pulse width limitations.
How do I align the bearing cursor?
Press the EBL (Electronic Bearing Line) key to activate the cursor. Use the rotary control to adjust the bearing. Press again to confirm and remove the cursor.
Why is the display showing interference or clutter?
Adjust the STC (Sensitivity Time Control) and FTC (Fast Time Constant) settings. Also ensure the antenna is properly installed and free from obstructions. Sea clutter and rain clutter filters can be turned on.
Where can I obtain a replacement fuse for the Furuno 1761 Mark-3?
Replacement fuses (3A, 32V) are available at marine electronics stores or from authorized Furuno dealers. Always use the correct rating to avoid damage.
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USER MANUAL 1761 Mark-3 FURUNO
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Product information
Brand : FURUNO
Model : 1761 Mark-3
Category : Marine Electronics