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    Muriatic acid on stripped outdrive. Is it safe?

    Muriatic acid is strong stuff. Likely too strong at full strength for aluminum. Get some nice course, medium and fine waterproof sandpaper and a bucket of water. Sand her down, hose it off, after dry, spray with self-etch primer, and then topcoat. Sanding is not that hard, even by hand.
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    Remove Driveshaft Housing without Lifting Powerhead?

    It would be nice to know what motor. Generally, the upper and lower motor mounts hold the midsection to the transom clamp. The gearcase and powerhead bolt to the midsection. If you unbolt the gearcase, the driveshaft will come with it.
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    97 Merc 200 carb, slow to plane out and no top end

    V6 Mercs do not have the 2+2 feature. Every cylinder on your motor runs continuously. Reed valves almost never wear out. I doubt yours's needed to be replaced. You might check timing at idle pickup and max spark advance. Maybe you messed something up when changing the reed valves. Do all...
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    1998 115 (E115SLECM) VRO leaking fuel

    You can get a brand new OEM OMS pump for $500, or a rebuild kit for $200, which has a 50% chance of fixing your issue. You pays your $ and takes your chances.
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    Fuel for older Evinrude/ Johnson

    Your first tank of e10 will tend to loosen some old crap in the fuel tanks. Be prepared to change the fuel filter after the first tank. Watch the rubber fuel lines for failure. Most fuel lines have already been changed to alcohol-resistant by now, but keep an eye on 'em. J/E motors after...
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    Epoxy resin to seal new decking

    Polyester resin and some medium weight cloth will seal it well enough. No need for epoxy. Amazon has both resin and cloth for a decent price.
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    1996 venom 200 double problems tachometer/reverse

    I have a 1998 Johnny 150HPV6. I have had some issues where the shift rod gets hung up due to corrosion, and will not go down into reverse. The fix is to drop the gearcase and figure out what is jamming the shift rod. You might like to see if this is your issue. Remove the cowling. Spin the...
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    Boat floor soft only around ski locker

    I had an '88 SeaRay with a ski well. When they installed the ski well cover they cut the plywood decking out, but did not seal the edges of the plywood. Moisture founds it's way in and rot ensued. Unfortunately, the moisture also rotted the floor of the ski well and the keel support under it...
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    Fuel vent question

    Gee, your fuel tank looks to be made of fiberglass. If so, the alcohol in today's gasoline can dissolve some of it's components possibly causing leaks. I agree that the tank vent looks unusual. As for your filling issues. You normally want the vent fitting on the tank to be as far forward as...
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    1987 Mercury 45hp classic 50 control cable anchor

    Here is a diagram of the area. There were a lot of 50HP models in 1987, so I had to pick one, but the cable clamp stuff is pretty common. https://www.crowleymarine.com/mercury/oem-parts/outboard/1987/1050717/shift-linkage-and-exhaust-plate?ref=1 Most stuff is d/c, but should be avail at...
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    1980 Avenger weight and hp rating

    Gee, I have owned a '74 16' Avenger since 1980. It is rated for 85HP, but I ran a Merc 1500 for decades and now I run a Merc 135HPV6. It has a 3/8" thick aluminum plate covering most of the transom. That dinky aluminum plate on the transom in the photo, is clearly not holding the transom...
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    No Spark, feels like I’ve tried everything.

    Gee, how exactly did you check the timing, if you have no spark?
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    1983 Mercury 50 HP 4 cylinder Electric Start Wiring Diagram

    Here is likely wiring diagram in color. https://maxrules.com/oldmercs/Wiring/1966ona/60.jpg If your wire colors match, then red is +12VDC; black is ground; blk/yellow is ign killer; yellow/black is choke solenoid; purple is power from ign switch; grey is tach signal; yellow/red is starter...
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    50 hp Merc 1985

    Look on the maxrules website for the wiring diagram and year. Your motor's serial no. looks to be a 1982. You probably have the new, common wire colors such as purple for ign power, but those 4-cylinder 50HP motors were really popular, so they were made the same for years after other models...
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    Bouncing Tilt and Trim on Way Down

    Well, bleed the unit, and grease the parts that move.
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    1979 Mercury 80 HP power trim

    The trim rams should retract all the way into the trim cylinders, when the motor is full up. At that point, you should be able to lift the gearcase by hand to use the manual locks.
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    Bouncing Tilt and Trim on Way Down

    Normally that is caused by the motor binding on the tilt tube or something similar. Grease the tilt rod, and make sure nothing else is binding.
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    1979 Mercury 80 HP power trim

    Merc850, I think he is well past the original wiring. He seems to have simplified it to a single switch and three wires. If his motor doesn't trim all the way under PTT influence, I would think it mechanical, or some other issue.
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    Fuel Pump for 1997 9.9 mercury four stroke

    I was unable to find a cross ref from your serial number to a Yammie. Take a couple of pictures of your motor including the powerhead w/o cowling. Go on the crowleymarine web site and work your way thru the yamaha 9.9HP motor parts diagrams of your year until it matches yours. Now see if...
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    Partial transom repair

    Watch the top corners of the transom for cracks. That is usually where they start. You going to junk the hull in a couple of years?
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