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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.

  • 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 (Also used after 2005 on some PCM 5.7 engines). Does NOT Fit: 454, 2006 up Indmar post mount sensor, 2008 up PCM with post mount knock...
    $70.75
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  • Water Temperature Switch to '95 Water Temperature Switch to '95

    Water Temperature Switch to '95

    PCM EEMS Pro Tec Ignition 1989-1995, 3/8" NPT (Actual Diameteter aprox 5/8") * 210 Degree (Limp Home). MARINE PCM PRO TEC WATER TEMP SWITCH. ALSO USED IN SOME INDMAR LT1 CYLINDER HEADS (FOR ALARM). Bin Number (ISBN): 80707  
    $46.00
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  • INDMAR DIGITAL OIL PRESSURE SENDER 55-1379

    INDMAR DIGITAL OIL PRESSURE SENDER 55-1379

    Indmar Digital Oil Pressure Sender. Indmar did not use until 2007 or so. The oil pressure sender is an important component of the engine, as it helps to ensure that the oil pressure is maintained at the correct level. If the oil pressure...
    $198.28
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  • SWITCH OIL PRESSURE SWITCH OIL PRESSURE

    SWITCH OIL PRESSURE

    PCM Pro Tec Ignition 1989-1994, GT40 All, GM 5.7. Replaces older style switch that was smaller in size. Will not fit/replace 2007 and up PCM Digital sender or 2006 and up Indmar. MARINE PRO TEC OIL PRESSURE SWITCH. Switch goes to ground to put engine...
    $54.60
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  • WATER TEMP SENDER R020019

    WATER TEMP SENDER R020019

    Sending Unit for the ECM, most GM 2 wire snap in connector, 3/8 NPT. Indmar Pt# 556013, later model LT1 screws into the T-stat housing (instead of 1 wire sender). Bin Number (ISBN): 2004202
    $18.08
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  • EMERGENCY CUT-OFF SWITCH /KILL SWITCH

    EMERGENCY CUT-OFF SWITCH /KILL SWITCH

    Emergency cut off switch to comply with the new coast guard mandate which means no pesky tickets. 4 Prong Wiring Connector. developed to meet the needs of boaters everywhere. In an emergency, a quick pull on the 3-foot coil lanyard stops the engine,...
    $29.00
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  • NEUTRAL SAFETY SWITCH NEWER STYLE 80'S + NEUTRAL SAFETY SWITCH NEWER STYLE 80'S +

    NEUTRAL SAFETY SWITCH NEWER STYLE 80'S +

    O-Ring Sold Separately Item #1242. Recommended each time you replace NSS. Fits Velvet Drive, PCM & ZF Hurth transmission (will not replace older style switch Item #1246).   MARINE NEUTRAL SAFETY SWITCH. O-ring sold separately...
    $23.59
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