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SENDERS/ SWITCHES/ ACCESSOR

Find high-quality marine switches at great low prices online at Discount Inboard Marine. We carry a wide selection of affordable marine senders and parts, including oil pressure switches, water temp switches, knock sensors and more, so you're sure to find the part you need.  Visit Discount Inboard Marine today to order your new inboard engine switches.

  • IGNITION SWITCH 4 POSITION/TERMINAL

    IGNITION SWITCH 4 POSITION/TERMINAL

    Polyester housing is rust and corrosion proof. 4 position "Accessory-Off-Run-Start" switch. Four 1/4" blade terminals. Supplied with brass back-up nut and knurled black plastic face nut with rubber cap to seal out splash and spray. Requires 7/8" mounting...
    $29.10
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  • FUEL PRESSURE CUTOFF SWITCH

    FUEL PRESSURE CUTOFF SWITCH

    Carbureted engines with electric fuel pump, can be used to replace 3 wire switches. (For a 3 wire switch, connect the red and orange wires together on one post and the purple wire by itself to the other). If you need more clearance use Item #121012. Bin...
    $72.05
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  • SENSOR, OIL PRESSURE DIGITAL

    SENSOR, OIL PRESSURE DIGITAL

    2007 PCM 5.7L SN: 480001 up, 6.0L SN: 485607 up to 2012.3 wire snap in connector 1/8" NPT. 2012 and up 6.0L and 6.2 LSA use Item #42117. Will NOT fit Indmar engines. Bin Number (ISBN): 21909
    $71.99
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  • SENDER, TRANSMISSION OIL TEMP 88-5178

    SENDER, TRANSMISSION OIL TEMP 88-5178

    Transmission temp sender. Used on mostly Mastercraft and Mercruiser, fits Velvet Drive and Hurth transmissions. Goes into top of transmission in a Velvet Drive 71 or 72 C.Also used in some Malibu's for the alarm. Even on some Fords 1990 on up. Bin Number...
    $68.00
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  • ENGINE ALARM WITH AUDIBLE WARNING ENGINE ALARM WITH AUDIBLE WARNING

    ENGINE ALARM WITH AUDIBLE WARNING

    Audible warning system for engine temperature and oil pressure. Keep your engine safe this summer. Works on Ford or GM older applications without alarms, EFI, or Carburated.  Oil pressure switch set a 6psi and temp switch set at 200...
    $49.00
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  • WATER TEMP SENDING UNIT

    WATER TEMP SENDING UNIT

    PCM 302, GT40 in circulation pump, Some Mercruiser (pt # 806490T), Early LT1 in the T-stat housing then moved to cylinder head around 95 (tapered threads are aprox. 3/4" in diameter). Also used in some PCM GM engines around 2002-05 located in the T-stat...
    $37.72
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  • KNOCK SENSOR GM KNOCK SENSOR GM

    KNOCK SENSOR GM

    Knock Sensor 5.0/5.7 GM OEM R020027: Fits:GM 5.0/5.7L TBI, MPI 1994 up thru 2005 Indmar and 2007 PCM. Does NOT Fit: 454, 2006 up Indmar post mount sensor, 2008 up PCM with post mount knock sensors (flat response). Purchase...
    $70.75
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