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  1. K

    1989 300 Weekender Battery Wiring

    Hi Our 300 has twin 5.7 and QS 4.0 with three batteries. does anyone have a wiring schematic on where each positive and negative of the batteries are connected. this boat has had someone change the wiring and I would like to try and get it back to the factory design Thanks
  2. K

    1989 Mercruiser 5.7 Water Temp Sending Unit

    Greetings I have a 1989 SR 300 Weekender with twin 5.7s. Port engine has a water gauge and RPM gauge issue i am hoping someone will help with. Water Temp - gauge is dead on zero. i checked the gauge for loose connections / grounds. anyone have a photo or exact description where on the...
  3. K

    1989 300 Underwater Platform Lights

    Can I get help with switch location? how are the underwater lights (under the swim platform) turned on and off? Where is the switch? thanks
  4. K

    1989 300 Weekender QS 4 Gas Generator

    Hi We have an onboard QS 4 generator. the previous owner had a ground issue and disconnected the power and ground connections at the solenoid. if there is anyone with the same generator, could you take a photo of the connections at the solenoid for me so I can check mine before I power it...
  5. K

    Cruisair AC Relay 1989 300

    Hi Hope this is the correct thread. We have a 1989 300 Weekender with the original Cruisair 10000 BTU AC system (three knob control panel). I flushed the system with Barnacle Buster and replaced the wet section of the circ pump. I did not re-prime the pump prior to turning it on (I know -...
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