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    A few questions from a learner

    Gee, you can get a brand new Turning Point 4 blade prop housing for MerCruiser for under $100. I use this prop on my heavy 21 footer and it works well. Cheaper prop housings are also available. Likely a direct replacement for yours is about $75. A reusable hub for that prop and many others...
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    Looking to find what this boat may be worth

    That looks to be an early 70's Avenger. The motor is likely '78-80 or so. Not sure what it is worth, being so old. What is the length of it? 18'
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    Mercury outboard serial number

    The maxrules site has a model year by serial number chart. I would say early 90's, but you should look it up.
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    Replacing Gas engine with electric motor

    You have twin V6 engines, right? There are some manufactured boats, although I do not remember one with as much power as you would need. I would recommend you see what they use for power and batteries. There was an electric ski boat. It ran for 2 hours and then needed an overnight charge.
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    Perfect Prop

    Mercruiser has several trim tab anodes, made for props with more rake. One of those might fit your outdrive, without grinding.
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    A few questions from a learner

    I think you should get a new prop. That one has significant chips, which will cost speed and efficiency. Make sure the current Tach turns in the middle of the max recommended RPM range before choosing the pitch of the new prop. If so, a 4 blade with 2" less pitch may be better for that...
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    1989 mercury 115 ignition test

    With the motor on it's side, the mercury switch might ground out the ignition. Older Mercs' had such a switch. Not sure if your motor has one.
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    1989 mercury 115 ignition test

    Take a look at the CDI Electronics web site. They should have an ignition troubleshooting procedure for your ADI ignition system. ADI systems do not use the battery to make spark. The switchboxes are grounded to kill the spark. Without controls, the motor would normally spark, when the...
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    1972 ranger fuel cell

    In that old of a boat the fuel tank could be steel or aluminum, if original. I doubt it is plastic, if original. It is likely amidships. Where is the fuel filler? it is likely a straight shot to the tank.
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    Best way to mount a 20” Evinrude 110 on a 25” transom?

    A new Jackplate is closer to $200. Maybe you can find a used one for less.
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    150 Johnson rod bearings snapping

    Sometimes rod caps have match marks with the connecting rods. Usually a scribed line. You might see if you have those. Obviously the bearings, if installed correctly and serviceable, will have zero clearance. A lot of motors call for new rod screws, after rebuild. Does your motor need these?
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    Question about resin

    If epoxy is sanded, poly will stick to it, just fine. I have never had an issue mixing the two, as long as both are fully cured, sanded and wiped with acetone. As was stated, poly is fine for most repairs. For example, for added strength on a crack in the gunwale of my speedboat, I used...
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    Another transom.

    Polyester resin is just fine for your transom. I have used it on dry PT lumber w/o issue. Stainless screws are fine with PT as well. It is the galvanized ones that corrode. Looks like you still need a piece for the very base of the transom. To lay it up use some mat on the old fiberglass...
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    Mercury inline primary pick up 4-6, which is better, 4 or 6?

    Those motors require the timing belt to be installed when the pointer on the distributor pully points to the dot on the timing decal. Often they are 1/2 tooth off. You can change yours by 1 tooth, and the idle may improve. This adjustment is outlined in the OEM service manual, I did not make...
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    Question about engine oil

    Gee, Paul, you may use any oil you like in your marine motors. I am concerned that you would recommend oil not specified by the OEM, to folks asking for sage advice. FC-W oil is branded by many at prices only slightly above automotive oil, so the savings are not much. It is obvious that...
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    charging not working on Merc 850 1974

    Look up Bridge rectifier to see the 4 diode configuration. On your Mercury rectifier, you have 3 connections and ground. So you need to check all the rectifiers for continuity one way and open the other way. Some digital meters have a setting for diode checking. Analog meters usually have...
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    charging not working on Merc 850 1974

    Did you check all 4 diodes in the bridge rectifier? They all need to be good for the battery to charge. If one diode is shorted to ground or open, the motor will not charge. You can check for an AC voltage at the rectifier, motor running, from the stator wires to prove the stator is good or bad.
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    2001 mercury optimax 135 running hot

    A leaking head gasket can cause overheat. Has that been checked?
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    Mercury inline primary pick up 4-6, which is better, 4 or 6?

    Normally in those engines, idle pickup timing cannot be set to a 1* tolerance. It can be set to 4-6* BTDC, and will show on the timing light, that it is always in that range. Racerone is correct that hesitation is likely caused by a too lean idle mixture. Just so you know, the top carb will...
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    Question about engine oil

    Did you use a FC-W motor oil or automotive multi-vis? The FC-W oil is made specifically for four cycle outboards, and is supposed to be more robust for the heavier power requirements of the marine engine, versus an auto engine.. The word is that the automotive oil is too wimpy for the high...
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