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    20" vice 25" lower unit--wanna trade?

    Anybody have a 20" lower unit that would fit my 82 115 hp inline six? Currently fitted with a 25" (bought it that way) but the boat needs a 20".<br />Or can I just buy a shorter driveshaft and remove the "spacer"? Someone said I could shorten the shaft but as it is splined, I don't see how...
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    year of Merc 7.5's?

    I am hoping someone can help me. I just bought two Merc 7.5 HP engines. Both, ahem, "need work" (maybe basket case would be closer to the truth) and I'm going to start with a manual, but first, if possible, I'd like to know what year they are.<br />First one, long shaft, s/n 4854918<br...
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    Merc 115 HP long shaft to short shaft? Can I?

    I have a 115 Merc with a 20" shaft. My boat has a 15" transom. The motor appears to have a section which would be removable, requiring replacement of the drive shaft with a shorter one. Is this easy/practical? My motor is down for a rebuid so this is the time to do it...Please advise.
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    Merc 115 disassembly questions

    Okay, my mighty 1984 Merc 115 inline 6 went down hard two weekends ago. I ran through some shallow channels at idle (same as I always do), kept an eye on the telltale, good water flow, then once the lake opened up I went up to 2/3 throttle for about 45 seconds, then the rpm dropped all the way...
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    Johnson 50 what year?

    My brother in law bought an older boat. He says it has a Johnson 50HP. It's been a while since it ran and I'm trying to help him; unfortunately, it's over the phone because he lives 1000 miles away. I asked him to find me the s/n so I could figure out the year and maybe find a manual. He...
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    Nearly rolled my boat--how/why???

    Still kind of a newbie, started boating last summer with a nice, slow (25 mph) 15' tri-hull. Last winter I bought a 1972 17' v-hull Crestliner with a 115 HP Merc. Ah, horsepower heaven! While out testing it with the previous owner (I was driving) when I got a bit of speed on it I was messing...
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    Uniden Marine VHF radio wiring

    I was given an older Uniden marine VHF radio. It has no power cord, but the receptacle has 3 pins. One would be power, one would be ground, and the third...? And which would be which? It's old, and it was free, but I don't want to fry it playing the odds...
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    fuel gauges wiring--am I close?

    Hi all and thanks again for a great board! My 72 Crestliner 17' v-hull came with an integral bow mounted fuel tank (still had the filler and vent fittings) but sometime in the last 30 years someone removed it; likely due to contamination/corrosion. It was fitted with two 6-gallon plastic tanks...
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    Motor? Steering? Rigging? Torque steer?

    Don't know if this is a boat issue, a motor issue, or an ignorance issue! I had my thirty-year-old-but-new-to-me boat out for the first time yesterday. While backing away from the dock, I noticed something funny. While the steering wheel has approx 3 turns lock to lock, the wheel turns two...
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    1972 50 HP Johnson idle mixture adjustment

    I have a Seloc book that says 1 1/4 to 1 3/4 turns; I have another book from the library that says 5/8 to 3/4 turns out--quite a disparity. Mine were set at 1 3/4 out, always seemed rich, and fouled a plug Saturday. Ideas and suggestions are welcome.
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    surface gap spark plugs

    Your opinions? I had a set in my 1972 50 HP Johnson; seemed to work well. Finally fouled one Saturday after about 45-50 hours total use (this year and last). Replaced with standard NGK B9HS, runs great--should I buy another set of the surface gap plugs or just stick with the normal type?
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    Merc prop interchangeability

    I'm hoping a Merc expert knows this one. Is the prop shaft on all inline sixes the same? i.e., can I buy a prop that came off a 63 100HP and put it on my 82 115HP (assuming correct pitch)? How about the V-6? Same shaft? I keep seeing props for sale that "came off" such-and-so engine and I...
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    Mercury outboard--what year?

    V-6, 175 HP, S/N 5393888, can you tell me what year? Thanks again, Rich
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    Johnson 50HP Hydro-Electric shift diode question

    Hi--I have a 1972 Johnson 50HP with the Hydro-electric shift. It works great but on engine shutdown the lower unit "thunks" into forward. The book says that the shift diode (aka "monkey balls") is done. I don't want to pay OMC/Bombardier $70+ for this thing. It appears to be two diodes in...
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    72 Crestliner 17' fuel tank--is it safe?

    Looking at buying a 1972 Crestliner, 17' v-hull. Looks as if it had a built-in fuel cell in the bow (filler cap and vent are still present) but it has been removed sometime in the past. Right now it has two six-gallon plastic tanks in back. No idea on the size of the original tank or it's...
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    72 Crestliner 17' fuel tank--is it safe?

    Looking at buying a 1972 Crestliner, 17' v-hull. Looks as if it had a built-in fuel cell in the bow (filler cap and vent are still present) but it has been removed sometime in the past. Right now it has two six-gallon plastic tanks in back. No idea on the size of the original tank or it's...
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    Data plate missing!!!

    1972 Crestliner 17 footer, pretty decent shape. Paint is way too fresh to be original, so I think it's been repainted. Big question...can't find the data plate. It's not on the transom, not on the dash, where else could it be...and if it's nowhere, how big a problem is this? With Illinois...
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    115 Merc/17 foot Crestliner

    I have a chance to buy a 1974 17 foot Crestliner with a 1986 115HP Merc--anybody have any knowledge of the boat, motor, or combo?
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    Crestliner 17 footer

    I have a chance to buy a 1974 Crestliner 17 footer with a 1986 Merc 115. Does anyone have any knowledge/experience with the boat, motor or combination?
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    Crestliner 17 footer

    I have a chance to buy a 1974 Crestliner 17 footer with a 1986 Merc 115. Does anyone have any knowledge/experience with the boat, motor or combination?
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