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    Sea water pump intake shutoff valve

    Can someone share a picture or diagram of what these look like and where they are located on a Mercruiser, preferably 7.4L? Does anyone know if a 1997 7.4LX MPI w/ Bravo 3 has this shutoff valve? If so, where is it? I presume it would be located on either the transom end or the pump end of...
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    Time it takes to prime cooling system?

    After a long winter, we put our boats in each spring and the outdrives and intake hoses are empty etc. The sea water pump is also empty if you have replaced the impeller. In my case its a 7.4LX MPI 1997. And I am testing for a potential bad sea water pump. How long does it take for the raw...
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    7.4L Overheating

    tried to make two preventive maintenance steps before launching this year. (1997 233 Boat sits all winter in NY.) 1) SEA WATER (RAW WATER) IMPELLER 2) THERMOSTAT I have done the impeller twice before so this was my third time. I do it every two years although impeller looks like new after two...
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    How to remove two little screws rusted on Ig Module

    I have a 1997 MERCRUISER - 7.4LX BRAVO (MPI)(GEN. VI) GM 454 V-8 1996-1997 I want to replace my ICM ignition control module. What size is the head of the screw? SCREW (#10-811638) Qty Required For Repair: 2 Supersedes: 10-850494...
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    Mercruiser Manual 16 vs 23

    I have 1997 MERCRUISER - 7.4LX MPI w Bravo 3 Should I buy 1996 Manual 16 or 1999 Manual 23?
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    Old Humminbird Depth Finder Repair

    My 1997 Cobalt 233 has a Humminbird HDR200RM depth finder that displays but the numbers just jump around. Finally figured out that is because signal wire is not connected to transducer and transducer is messed up/busted. I can get the Humminbird Boat Angled Transducer XAP-6-16 online. Has...
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    Trim goes down but only goes up with Trailer button not when using up switch

    1997 Cobalt 233 with 7.4 L and Bravo 3 As stated in message title, trim will go down but only goes up with Trailer button. Should I focus on "up switch" in shifter handle or is there an up relay or solenoid that I need to replace? When I hit up button NOTHING happens.
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    Overheating Volvo 3.0GS with SX drive

    My 2001 Glastron SX175 has a 3.0GS Volvo that was overheating last summer, usually after about 20 minutes at 3500 rpm cruising. This spring I replaced the raw water impeller, and I replaced the thermostat. I found bits of the old impeller in areas upstream of the thermostat and removed them...
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    Marina did not drain motor for winterization

    I bought a 2001 Glastron SX 175 from a marina in New Jersey last May. I paid them to winterize it in October. When I got it home I noted they did not change the oil. They acknowledged that oversight but stated everything else was done. Last night I found the the drain plugs and loosed the...
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