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    rpm gauge

    You should repost this in the yamaha motor forum. Does crowleymarine show an accessory tachometer for it?
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    1997 Johnson Mod: J90TSLEUA

    Gee, the OMC 90* 90HPV4 engine was made for a lot of years. I think the first one I saw was in the late 60's (crossflow version). They lasted until about 2000 (loop charged version), when replaced by the 60* V4 engine series. They were one of the best and most popular engines ever made, IMO...
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    Water keeps filling boat cover, please help!

    Gee, on my 21 footer, I put a 2X4 from outboard motor hood to windshield, and then to bow. I use light (1/8") rope going side to side over the 2X4, and connecting to cleats, handles, and anything else solidly attached to the hull to make a tent. Then toss a cover over it and see if that gets...
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    1986 Mercury 150 V6 worth?

    Gee, I bought a '93 Merc 135HPV6 in 2008 or so, for $1K. It was complete, and ran fantastic. I still have it and it still runs fantastic. $2500 for a 1986 of unknown condition, seems a pipe dream, at least to me.
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    1986 Mercury 150 V6 worth?

    Fresh water use is much better for their value than salt..... Not many here at the Jersey shore would buy a motor that old used locally.
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    L/U Casing # 1647 6670 vs 1647 6670C

    Gears, bearings and the like are fairly expensive, and take special tools and knowledge to install. Have you priced a replacement gearcase from SEI? It could be close in cost to the parts you need.
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    Merc 30hp 4stroke

    Use jumper cables on the starter? That will spin the motor, and you can check compression. If you want to test for spark, that is another matter.
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    Replacing Keel rollers

    Gee, I thought it a count, wire brush and paint as the first step. Now as the final step, order the right parts, receive and install the new hardware. The OP made it more complicated than I thought it should be. JMO
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    Replacing Keel rollers

    Gee, Amazon seemed to have some 3" ubolts. None of these worked? https://www.amazon.com/s?k=3%22+galvanized+ubolts&crid=1067AZ14W3TPD&sprefix=3+galvanized+ubolts%2Caps%2C76&ref=nb_sb_noss_2 or here: https://www.mcmaster.com/products/square-u-bolts/finish~galvanized/
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    Replacing Keel rollers

    Well, I a real surprised you are having trouble getting galv u-bolts at that place. They are pretty generic, in my mind. I would expect you could order them on the web. Maybe not as cheap as Amazon, but they should be available from a fastener place. I always bought replacement parts...
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    Needing higher rpm

    I am real surprised that an IL6 can spin a 23P on a 'toon. I had the 1500 version of the IL6 and she had a real hard time spinning a 23P prop on my 16 foot speedboat.
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    Needing higher rpm

    Yes, your tach cannot display oil pressure as there isn't any. Water temp will go from dead cold at idle to warmer at cruise, but without a thermostat in the motor to hold a steady temp., it is pretty useless. Now if you could program the oil pressure gauge to read 0-15PSI water pressure, and...
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    Needing higher rpm

    Most 'toons with std power do not go much faster that 25MPH. You need to check the accuracy of the tach and speedo.
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    Replacing Keel rollers

    The u-bolts will likely snap when you go to remove them. As long as they are not too thick, breaking them is probably easier than cutting them off. HD Gavanized is a reasonable replacement. Concentrate the paint on the areas that are rusty or look like they are close to rusting. Use a wire...
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    1985 Mercury 115 tower of power

    A 1977 IL6 ignition system will have battery powered CDI with a distributor. There must be +12VDC on the white wire, next to the red wire, at the switchbox. The red wire has voltage all the time, the white, only when the ign switch is on or start.
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    1985 Mercury 115 tower of power

    Those square ports are for idle pressure relief. They allow water to exit the powerhead, when the motor is in the water in neutral. The carb floats are a normal replacement item. The original floats were a yellowish hard foam. These tended to dissolve in today's fuel that contains alcohol...
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    Replacing Keel rollers

    Well, you can replace 'em now, or when they break when you are pulling the boat. JMO.
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    Replacing Keel rollers

    The price is criminal, IMO, but they last forever.
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    Replacing Keel rollers

    I would remove the old rollers, and replace any bolts or ubolts that are pretty rusty. Now wire brush any rust spots, and apply cold galvanizing paint to the entire trailer. Now bolt on the new rollers, with new hardware, install the new carpet and that should extend the life of the trailer...
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    1991 DT100 Crankcase Puncture

    Look in the lower cowl for bearings, pieces of rod etc. Does the flywheel rotate 360*?
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