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  1. C

    Fuel Leak, center carb

    The brass plug is a taper fit, and is usually covered with a substance like nail polish. I would first try to tighten the plug. Failing that, remove it and put some fuel resistant sealer on it. Permatex makes some, or you can clean it with alcohol or acetone and put wife's nail polish on it.
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    Controller Model and Neutral Safety Switch issue

    A lot of motors do have fuses for power to the control. They are usually on the motor, near the starter solenoid, They would normally be on the red wire. Of course, if the fuse is blown, it is likely you have a short circuit somewhere.
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    Sealant for Gas Tank Gasket

    Mine was blue and non hardening. I used it on some fuel sender gaskets, and it worked well.
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    1980's Mercury 175 power trim

    ARCO and Sierra make aftermarket trim motor replacements. Your 1986 motor likely has a 3 wire PTT motor, unless it has been replaced before. 3 wire PTT motors use 2 solenoids to power them. Newer PTT motors are 2 wire, and use 2 relays to power them. The wiring harness is different, but...
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    Sealant for Gas Tank Gasket

    Permatex makes one that works for that purpose. "Permashield fuel resistant gasket dressing" is it's name.
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    Wiring a 72 glastron v-hull.

    If that is the way you want to wire it, that is fine. However, you do not want a 30A fuse going to your lights or other accessories that use a small amount of power, as it is a fire hazard. just so you know, lights are usually 3A or so, radios, fishfinders, GPS are generally 2A or less, a horn...
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    Propeller Interchangeability

    You should be able to use the OMC prop on your Merc. You will need to find a thrust washer that fits. I used a Merc V6 prop on my Johnny 150HPV6, without issue. I had to drill out 1/2 of the splines, because the Johnny's propshaft splines are a lot shorter than the Merc's I think I ground...
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    Thrust washer…..

    A lot of thrust washers work with many props. Some work with a few. You should find out if your thrust washer is designed for your prop, and for any replacement prop you may get. I keep props and thrust washers as sets, although it is usually easy to tell if the thrust washer fits the prop...
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    Wiring a 72 glastron v-hull.

    Normally on a boat like yours, you would have a dedicated wire from the battery (fused at 20A or so), plus a dedicated ground wire from the battery to a front fuse strip. The accessory circuits would run from individual fuses to the accessories. However, I like to run everything thru one HD...
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    Does the Lower engine mount wear out?

    Look inside the large metal ring, where the rubber is connected to the small metal ring. There may be cracks there. What I can see looks good......fresh water is so nice....
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    Merc 650 prop shaft seals

    See if you have a part number on the gearcase so you can ID it.
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    Controller Model and Neutral Safety Switch issue

    The neutral safety switch must be mounted where the throttle arm can open and close it. That means it is inside the control. Your first move is to disassemble the control and look for the switch. Perhaps a wire broke, or the mechanical device that pushes the switch to close it is broken, or...
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    Does the Lower engine mount wear out?

    OK, it sounds like a non issue..... Obviously, you have a fresh water motor..... Just for fun, you might pop off the lower mount covers and see if the rubber in the mounts have cracks.
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    Ignition switch

    It should use a magneto style ignition switch. Are they universal? They are mostly universal for outboard motors, but not for sterndrives. Look for one with the B, I, M, M C, S posts on them. Connect your point wires to the M terminals.
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    Does the Lower engine mount wear out?

    The last time I replaced the upper mounts in my V6, even those bolts had to be cut. The mounts had corroded to the bolts where I could not drive the cut bolt end out of the mount with a punch and vise. I expect the lower mount bolts to be similar in their corrosion or worse.
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    Mid and lower unit trouble please help

    I like to install the gearcase with the gearcase and control in neutral. Are you replacing the midsection? What is wrong with your's?
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    Does the Lower engine mount wear out?

    So you cannot cut the lower mount bolts, drop the yoke and pry the mounts out of the midsection? It looks like you would need to put the bolts in thru the yoke first and put the nuts on the new mounts in the midsection. I never had to change them on my V6, but it sure looks like you could...
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    Does the Lower engine mount wear out?

    The top mount requires that you remove the powerhead. Pretty serious repair for a novice. The bottom mount requires that you remove the gearcase. You should then be able to pop the mounts out of the midsection and drop the yoke, bolts and mounts as a unit.
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    pulls right at wot

    Does trimming the engine make any difference? It should.
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    Does the Lower engine mount wear out?

    On my '93 Merc, the top mounts wore out. The bottom was fine. Give the motor a pull and wiggle to check the top and bottom mounts for looseness. You might locate/price new mounts for that motor. The Merc ones were outrageously expensive, and the aftermarket (Sierra) were not plentiful. I...
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