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    Mariner Magnum III 150 hp losing top end

    Usually I can figure out odd issues on my own, but this one has me stumped: I have a 1994 Mag III 150 hp outboard with a 21" pitch stainless prop mounted on my 18' Ebbtide bowrider. At WOT, I can usually see ~6200 RPM, but I back it off to ~5800 RPM since 6200 is too much. However, when I took...
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    Cavorting with the enemy?

    This is not a stuipd trick, but rather something that happened to me yesterday on the lake; a learning experience, if you will. First, let me make an unfair generalization: All jetskiers are A55E5. They buzz up and down the lake, through no wake zones, and next to anglers with total disregard...
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    overheating alarm - part number

    I have a '94 Mariner Mag III, but I have no overheat alarm. The terminal block for the electrical connections from the main engine harness are there. Does anyone know the Mercury part number for the appropriate noise-maker? I can't seem to find it in my manual or on the Crowley site. Any help...
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    Being safe . . . a little too safe

    First, a little background: When I was a kid, I saw two boats collide and one of the drivers didn't have his kill switch lanyard attached. He was thrown out of the boat, but his six year old son was not. The boat continued moving in a forward semi-circle at 40 mph until is ran aground on the...
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    depreciation in the event of insurance claim?

    Recently, I had to file a claim with my insurance company. They were great to deal with . . . until they told me the amount of the check they were issuing. It was significantly less than the amount of the loss (minus deductible). The claims agent told me that it was common practice to depreciate...
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    Mariner Mag III prop shaft runout

    My prop got into some nasty stuff on the lake yesterday (submerged stumps) and is now trashed. I'm wondering if I should look into replacing the prop shaft, too. My manual doesn't have a spec for runout. Does anyone know the tolerance for this?
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    Time for a new prop. What would be good?

    So it's time for a new prop and I need some guidance as I've never selected a prop before. Here are the vital stats: Boat: 18' Ebbtide ski boat (1075 lbs dry / ~1475 lbs fully loaded) Motor: 150 hp Mariner Mag III Current prop: p/n 48-78122-21 (I think this is 21 pitch / 16? rake / 13.75"...
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    So far I'm 2 for 2 with the new boat!

    I've taken my new boat out twice and both times have managed to perform a stupid human trick: 1. Sunday, I took the boat to my local lake for a test drive. The park with the boat launch was packed because they were having a mountain bike race; so there were cars, kids, and cyclist everywhere...
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    Mercury Black Max 150 to 175 conversion?

    I'm thinking about buying a 20' bowrider that's powered by a 1991 or 1992 (can't recall at the moment) Mercury Black Max 150. The owner told me that the engine has been "jetted up to a 175". Therefore, in his mind, it's a 175. Is this even possible? I would think "jetting it up" would just make...
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    What do you think?: 1988 Glastron V-216

    I'm thinking about buying one of these, but can't find too much information on this particular model. Here is what I know: outboard sports-fisherman, 20.6 feet long, weighs 2030 pounds, beam 96", powered by a 1991 Mercury 150. I have not seen this boat in person yet, but the seller assures...
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    "Don't worry, that sign doesn't apply to us"

    I bought my first boat this past summer and have been wearing it out ever since. It's small (14.5'), light (~370 lbs), and just fast enough to get the driver into trouble (25 mph - max). My son and I were fishing on Melton Hill Lake (which was created by damming the Clinch River) in Knoxville...
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    "Pinning a prop", ever heard of this?

    I was talking to the local marine parts guy and he mentioned that he no longer re-hubs props, but rather "pins" them. Apparently, what he does is drive several brass pins through the hub from the outer radius of the prop, thereby linking the prop, hub, and inner hub together. He states that he...
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    Where do you buy your outboard parts?

    Soon I will need to purchase a clutch dog and forward gear for my '73 Evinrude 25 hp Sportster. Being unfamiliar with outboard parts suppliers, I don't know if I need or have to buy my parts from an Evinrude dealer, or does the aftermarket supply same-quality parts. I guess my first question...
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    Spun prop hub, worn clutch dog, or other?

    My son and I took the boat out last night for a little ride and some fishing. We covered 30 miles of territory. During this ride, I noticed a soft "bump" sensation two or three times while at WOT; almost as if we hit a small log. However, we would lose a little speed. The engine would maintain...
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    Starling-Jet Troller P-500 outboard

    My father dropped one off at my house yesterday. He even included some 30 year old gas in the accompanying gas tank. He said that he thought it used a 5hp Clinton powerhead, but wasn't positive. It appears to have some sort of weedless jet-style drive on the lower end. The last time it ran was...
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    New boater's first major stupid trick

    I thought boating would be something that my son and I could do together, so I bought my first boat a few weeks ago. The boat that I ended up buying didn't come with an outboad. No problem, there is a marine racing shop nearby that sells used outboards. I brought the boat home then headed to...
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    Do you let your outboard warm up?

    I'm brand new to boating, but not to the internal combustion engine. I always let my car, truck, bike, whatever, warm up before pushing it too hard, but I see a lot of boaters running their rigs wide open as soon as they hit the water. The engineer in me says that can't be good. Do you folks...
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    Hydrofoils and trim tabs really necessary?

    Hi all, In recent months, my 4 year old son has become obsessed with fishing. So the next logical step was to buy our first boat; which we did a few weeks ago. It's nothing special (although it may be something to laugh at), just an old '65 MFG Challenger with an Evinrude 25 tiller-steer...
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