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    2005 Mercury 115 ELPTO No Spark

    In that case, you will need to keep your current motor running. Here at the NJ shore, 2 cycle OB engines and OB engines with carbs are just about gone. Between the salt water and the shortage of DIY mechanics, old motors are junked more frequently than those used on lakes, and where owners...
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    2005 Mercury 115 ELPTO No Spark

    I don't know if CDM ignitions in your era had an ECU. It may be just a trigger and carbs. Newer motors will have an ECU, when they went to direct or manifold fuel injection. I just am not sure when they were incorporated.
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    2005 Mercury 115 ELPTO No Spark

    ADI refers to alternator driven ignition. They consist of a stator, one or two switchboxes, a trigger and one coil per cylinder. They appeared in the mid 70's on 3 and 4 cylinder motors, and by late 1979 were on all larger motors. CDM ignition consists of a stator, a trigger and one coil/CDI...
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    1989 Mercury 200 Black Max

    A 1989 motor would have the oil injection system, I would think. if so you have alarms for low oil and overheat. Any idea which alarm is sounding? Check the wiring harness for bare insulation on the tan wires. Tan wires with and without traces are usually the alarm control wires.
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    2005 Mercury 115 ELPTO No Spark

    Does that motor have ADI ignition or CDM ignition? In CDI ignition, the switchbox pulses voltage to the coils to fire the spark plugs. On CDM ignition, the stator powers individual CDI units at each spark plug. Since you replaced all the likely suspects, except the trigger, you might check...
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    '19 115 Merc water in fuel

    Merc Optimax's had a spin on fuel filter on the port side. It had a water sensor.
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    Required Safety Course

    The current Boating Safety course in NJ is almost word for word the USCG safety course I took in 1967. I would therefore expect states would accept Boating Safety Certs. from other states, except of course, they don't have to.
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    Crownline gas tank

    On my '88 SeaRay, the interior frames had screws holding them. Once these were out the engine and fuel tank were easily accessible. On the other hand, my neighbors Boston Whaler outrage broke a stern eye. Unfortunately the stern eyes had been installed before the top cap was put on. There is...
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    Why would SELOC say never start the engine using the fresh water attachment.

    SELOC manuals often have catastrophic errors in them. An OEM owners manual (usually free) often has flushing instructions.
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    Replace OMS pump with aftermarket or Original

    Thanks for the reply. I do like the auto oil injection. I guess I am flying off the idea of a rebuild for $200 vs an OEM pump for $600. Your point about the oil side is valid, since there are no rebuild kits for the oil side.
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    Replace OMS pump with aftermarket or Original

    My 1998 Johnny 150HPV6 has the original OMS pump. It is working fine, however, It has been 25years or more since new. Should I replace it as a part of PM and if so, should I use a rebuild kit ($195), an aftermarket one ($150) or an oem part for $600?
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    Rotate Impeller on Occasion

    Hey Cyclops, you might mark the flywheel before storage. That way you can tell if they ever did it. Not that I don't trust marinas implicitly. They are usually bastions of honesty.
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    Is this propped up enough

    You might clean off the rust with a piece of emery cloth, prior to driving out the pin. Lubrication of the pin is also likely a good idea.
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    94 merc 150 xr6 over heat

    So the motor is cooling properly?
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    Rotate Impeller on Occasion

    Cyclops, You are kidding, right?
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    94 merc 150 xr6 over heat

    That motor is cooled at low RPM by the thermostats. At high RPM it is cooled by the poppit valve. Did you check/rebuild the poppit valve? Have you checked the water intake holes in the gearcase for blockage. Often a broken piece of impeller will fall under the waterpump and clog that up...
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    Mercruiser 5.0 MPI - Constant beeping

    Also, some of the MerCruisers had a temp sender for the temp gauge and an overheat sensor for the alarm. Make sure the wires were not switched as the overheat sender was either ungrounded (normal) or grounded (overheat). The temp sender for the temp gauge was a variable rheostat with different...
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    Mercury BlackMax 175Hp, difficult staring, and then bogging down.

    Look for a silver disc on top of the block. It should have the serial number. My '93 has that exhaust idle relief tube, but I do not see it on your motor. You might reconnect your overheat sensor, as I see the tan wire hanging loose. Of course, it may be the temp gauge sender wire, it is...
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    Gph at various rpm...thoughts?

    It is very hard to give accurate numbers for your boat. It depends on hull design, trim position, load in the boat and other factors. i.e I had a Merc 1500 IL6 on my speedboat, for years. Once I had the boat loaded with camping gear, more than I ever loaded it up before or since. I ran...
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    Mercruiser 5.0 MPI - Constant beeping

    You do not give a year. The engines changed a bit over the years, especially the thermostat housing. The temp alarm would sound if the sender wire was grounded. The sensor would ground the wire when it overheated. If the temp alarm wire fell off and touched the block or got pinched causing...
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