Mercruiser Sterndrive Engines - 496 Mag HO Model

2-Wire Fuel Level Sender
Starting From:
$77.99
This Part has options, please click the button below to order.

2-Wire Fuel Level Sender 240-33 Ohm

105-91 + Option(s)

2-Wire Fuel Level Sender 240-33 Ohm

  • With a double tube design, these senders measure the amount of air trapped between the tubes providing you accuracy you can't get from float style senders
  • For use with 240-33 ohm gauges
  • (240 ohm empty and  33 ohm full)
  • Will work for gasoline or diesel fuel
  • Works with DATCON, LIVORSI (or gaffrig newer than 1996), OMC, STEWART WARNER, TELEFLEX US GAUGE, AUTOMETER, FARIA, and Hardin Marine gauges. Does not work with any digital gauge. If you have a 240-33 ohm gauge that is not on this list you must use 3-wire sender instead.
  • Gasket Included
  • No Mounting Hardware included.

Note: Includes gasket.

NOTE: These senders can only be trimmed to a minimum of half their original length, Such as 6" for a 12" Sender and 12" for a 24" sender and so forth. 48" and 60" are made to order and have 3 week lead time.

These senders will NOT work with digital gauges. These senders will not work with dual station or two gauges trying to read from one sender. They are designed for analog type marine fuel level gauges. Use the 3-wire sender for digital gauge applications.

IMPORTANT: These senders must be re-calibrated if trimmed. THEY DO NOT auto calculate full and empty! See Instructions. The senders auto calibrate to type and grade of gas used.


2-Wire Fuel Level Sender
Starting From:
$77.99
This Part has options, please click the button below to order.

3-Wire Fuel Level Sender 240-33 Ohm

105-91 + Option(s)

3-Wire Fuel Level Sender 240-33 Ohm

  • With a double tube design, these senders measure the amount of air trapped between the tubes providing you accuracy you can't get from float style senders
  • For use with 240-33 ohm gauges
  • (240 ohm empty and 33 ohm full)
  • Will work for gasoline or diesel fuel
  • Gasket included
  • No mounting hardware included.

NOTE: These senders can only be trimmed to a minimum of half their original length, Such as 6" for a 12" Sender and 12" for a 24" sender and so forth. These senders will not work with dual station or two gauges trying to read from one sender. 48" and 60" are made to order and have 3 week lead time.

Note: Includes gasket.


Adjustable Fuel Level Sender
Your Price:
$29.95

Adjustable Fuel Level Sender

105-FS102

Adjustable Fuel Level Sender

    • For use with 240-33 ohm gauges
    • (240 ohm empty and 33 ohm full)
  • Adjustable and can be tailored to most fuel tanks.
  • Most common type of fuel level sender in production style boats today.
  • Standard 5 Hole mount.
  • For Tanks 6" to 24" deep.
Note: Comes With Gaskets

Fuel Level Sender with Return Port
Your Price:
$59.99

Fuel Level Sender with Return Port

105-91350

Fuel Level Sender with Return Port

Designed for top mounting in aluminum, plastic or stainless steel fuel tanks in all types of marine vessels. All stainless steel construction resists corrosion and is ethanol compliant. Meets and exceeds current NMMA and ABYC specifications. SS 1/4" NPT female thread with 3/8" barb. 1/4" ground spade terminal. Pre-bent 90 degree float arm.

  • 6" to 24" tank depth
  • Will not rust or corrode
    • Calibrated for 240-33 ohm gauges
    • (240 ohm empty and 33 ohm full)
  • Adjusts easily to fit your tank
  • Tested to insure accurate readings

Note: Includes gasket and hardware


Fuel Sender Gasket
Your Price:
$3.99

Fuel Sender Gasket

105-91385

Fuel Sender Gasket

  • ID: 1.50"
  • OD: 2.70"

Replacement Gasket For Use With: 2-Wire, 3-Wire and Adjustable Fuel Level Senders


Water Temerature Sender
Starting From:
$19.99
This Part has options, please click the button below to order.

Hardin Marine Oil / Water Temperature Sender (Gen I, 2018 and Earlier Gauges)

105-936 + Option(s)

Hardin Marine Oil / Water Temperature Sender

  • Brass non-corrosive body for superior performance and accuracy
  • 105-93600 is dual purpose water /oil temp sender, with temperature range 100-340 degrees
  • All other sizes are ranged for water temp only with a range on 100-240 degrees
  • Select the size that fits your application needs
  • NOTE: For use on 2018 and earlier Hardin Marine gauges.

Hardin Marine Oil / Water Temperature Sender (Gen II, 2019 and Later Gauges)
Your Price:
$24.99

Hardin Marine Oil / Water Temperature Sender (Gen II, 2019 and Later Gauges)

106-9905

Hardin Marine Water or Oil Temperature Sender - 2019 and Later Model Gauges
1/8" NPT sender with 1/4", 3/8" and 1/2" NPT bushing kit, Oil and Water Temp Sender

These electric temperature senders feature a brass non-corrosive body that allows the sender to transfer temperature extremely accurately. These senders include bushing kits to fit multiple size applications.


High Vibration Electric Oil Pressure Sender 0-100 PSI, Autometer Gauges
Your Price:
$35.99

Hardin Marine Oil Pressure Sender 0-100PSI (Gen II, 2019 and Later Gauges)

106-9900

High Vibration Electric Oil Pressure Sender
0-100 PSI, for Hardin Marine Gauges 2019 and later

These heavy duty oil pressure senders are designed to take the high vibration and punishment performance engines dish out, while providing superb accuracy. These senders are 1/8" NPT.


Hardin Marine Water Temperature and Oil Pressure Sender Combo Set for 5 Gauge Kits (Gen II, 2019 and Later Gauges)
Your Price:
$49.99

Hardin Marine Water Temperature and Oil Pressure Sender Combo Set for 5 Gauge Kits (Gen II, 2019 and Later Gauges)

106-9910

Hardin Marine Water Temperature Sender and Oil Pressure Sender Kit - 2019 and Later Model Gauges
1/8" NPT sender with 1/4", 3/8" and 1/2" NPT bushing kit, Water Temp Sender, and Oil Pressure Senders

This kit includes all the senders you need to complete a new installation of a Hardin Marine 5 Gauge Combo Set.


Hardin Marine Water Temperature and Oil Pressure Sender Combo Set for 9 Gauge Kits (Gen II, 2019 and Later Gauges)
Your Price:
$99.99

Hardin Marine Water Temperature and Oil Pressure Sender Combo Set for 9 Gauge Kits (Gen II, 2019 and Later Gauges)

106-9915

Hardin Marine Water Temperature Sender and Oil Pressure Sender Kit - 2019 and Later Model Gauges
1/8" NPT sender with 1/4", 3/8" and 1/2" NPT bushing kit, Water Temp Sender, and Oil Pressure Senders

This kit includes all the senders you need to complete a new installation of a Hardin Marine 9 Gauge Combo Set.


Oil Pressure Sender 0-80PSI
Your Price:
$35.99

Oil Pressure Sender 0-80PSI (Gen I, 2018 and Earlier Gauges)

105-25470

Oil Pressure Sender 0-80 PSI, Hardin Gauge (2018 and Earlier), Medallion


Pitot Tube Standard - 5", 7" or 10"
Starting From:
$27.99
This Part has options, please click the button below to order.

Pitot Tube

105-936 + Option(s)

  • Offered in 5", 7", or 10" sizes
  • Fits most stainless style speedometer pick-ups




SFW Fuel/Water Level Senders
Starting From:
$60.99
This Part has options, please click the button below to order.

SFW Fuel/Water Level Senders

730-SFW + Option(s)

SFW Fuel/Water Level Senders

How It Works
Measurement is done by series of reed switches positioned inside the level tube. A float with built in magnets then triggers the reed relays generating a potential - free resistance with an ohm value that increases or decreases. Resistance output is fully customizable. The float is the only moving part of the sensors, thereby minimizing potential mechanical failures. All sensors are fully insulated to protect against voltage inside the tank.

  • Suitable for Gas, Diesel and Water
  • 316 Stainless Steel
  • SAE 5 Hole Pattern
    • 240-33 OHMS
    • (240 ohm empty and 33 ohm full)
  • other resistances available upon request
  • Constructed to meet and/or exceed all applicable
  • ISO, NMMA/ABYC and USCG standards
  • Optional threaded NPT Adapter for screw in applications
  • Sensors are fully insulated to protect against voltage inside the tank
  • Float is the only moving part of the sensor, minimizing mechanical failure
Sending unit length should be a minimum of one (1) inch less than the plastic tank depth, and three quarters (0.75) of an inch less than the metal tank depth. Note: If metal tank surface flexes, deduct one (1) inch from the depth.