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    Identifying early V4 power head?

    I found a used V4 power head today, it's most likely early 70's. Instead of having individual coils, the plug wires all come from beneath the flywheel? Can this be converted to use on a slightly newer motor? It has near perfect compression with all cylinders being in the 145 psi range. It's...
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    135 HP age?

    I have a 135 HP motor with the following tag, Model 135683G, Ser. # J0003033, can anyone decifer the year on this one? It's been camoflaged and there's no sign of any old decals. It runs good, but has power tilt issues. Also, it has the early power tilt, can I convert this motor to the later...
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    Mercruiser 120 prop shaft seal replacement?

    I have a boat with a 1971 Mercruiser 120 I/O unit and it's beens stored for a few years in a garage, the prop shaft seal is showing signs of oil around it. How much trouble is it to fix that seal? The lower unit was rebuilt and never run before it sat, is that seal replaced from the outside or...
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    Mercruser 120 oil seal replacement?

    (Moved to Mercruiser I/O forum)
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    V4 Parts interchangability?

    I picked up three motors today, one is a 25" shaft 135 hp V4 that has a bad miss and low compression on one cylinder, the other is a 20" shaft 115 hp in pieces, but with a new powerhead that caught fire due to an electrical short, and the third is a 25" shaft length 150 hp V6 that is tired but...
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    Chrysler 50 HP early 60's?

    I looked at a boat today that has what I believe is an early to mid 60's 50HP Chrysler motor. The number plate is badly defaced, and I am not able to make out any of the numbers. It has the semi rounded style fiberglass cover with the aluminum trim panle in front. It's a twin cylinder with a...
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    Aero Craft Trihull?

    I looked at a pretty neat looking boat today, it's an early to mid 60's era trihull, made by AeroCraft. The hull is not a very pronounced trihull and more resembles the more modern style hulls. The floor has a few soft spots but the transom is solid, the floor looks like it only spans the...
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    Another Ted Williams 7.5 question

    I came across a complete TW 7.5 with a Tecumseh engine the other day, it seems to be in decent shape and don't seem to have had much use. It runs but the top crank seal leaks making it about imposible to get a good carb adjustment. It's been sitting for at least 35 years from what I was told but...
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    Motor size question

    I have a 19' Renken 900 V hull that I bought sans motor, I was wandering if a 70HP Evinrude that I have would work on it? The hull is rated for 150HP, but had an 85HP Johnson on it before I got it. The 70HP is a fresh overhaul and runs strong. I've been looking around for an affordable, larger...
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    Steering cable style vs horsepower?

    I am in the process of replacing the helm and steering cable on an 18' open boat that will most likely have a 70 HP Johnson motor. I have several other boats, all similar but this is the only one that had the steering cable that goes throught the tube in the motor with a steering rod. The others...
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    Transom question

    I keep reading about all the transom problems everyone has and the many materials that can be used to rebuild them but I have yet to see anyone use or talk about aluminum? My one boat uses what appears to be stacked, welded aluminum tubing, about 1.5" square, which is glassed in on the outside...
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    Mercury 650 4 cyl.

    I have the chance to upgrade from a Merc 500 50hp to a Merc 650 65HP. The 500 is too small for my boat and I think the added 15 HP would be just what it needs. The 50HP is a 1976, and the 65 HP is a 1971 model. Does this sound like a logical swap? The 65HP has excellent compression, looks...
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    25HP Evinrude Age?

    I came across a pair of used 25HP engines today, I am not sure about the year, but I am guessing early to mid 70's. It's got the more modern square box style top cover, the exaust exit is above the prop, not through it like on my 30HP. The model number is 25R73-A. Also, can this be converted to...
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    What ever happened to trihulls?

    I can't help but notice that there are fewer and fewer trihull boats out there. I also don't recall seeing any late model trihulls either. What ever happened to this style hull? What there some strange defect that made everyone stop making them? I personally really like them for river fishing...
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    Crossflow vs looper for saltwater use?

    I have been looking at several mid 80's and up V-4's, I was told that since I run mostly in saltwater, I should be looking for a crossflow? Does this make any sense? Why? What is the difference between the two designs and were the V4 motors availble in both styles at the same time? or Where...
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    '73 Mercury 500 not charging

    I picked up a parts boat today, I was told that the motor didn't run but figured I'd give it a shot anyhow and it started and ran fine, the only thing I found wrong is that it don't seem to charge the battery? How much do these actually charge? Should I see an increase in volts at the battery...
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    New bunks, end-up or sideways?

    I am setting up a trailer for one of my boats and wanted to get a few opinions on which way I should set the bunk boards. I am replacing all the brackets so I have a choice, either to set then end wise or flat. I feel that endwise is stronger and supports the weight of the boat better, but flat...
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    Checking compression

    I can't help but notice how many here are checking compression on various engines. A few years ago I bought a motor from a local repair shop that was sold to me as needing an overhaul or new power head. I was told that it had very low compression. It looked like a new engine in appearance. I...
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    Adding OEM Power tilt to 70HP Johnson?

    I have a good running 70HP Johnson 70 from the early to mid 80's, it has no power tilt/trim. I have the chance to buy a 1992 motor that has it, but is blown up and missing the power head, whats left is clean, would the '92 unit fit the earlier motor? The same guy also has a V4 tilt unit, might...
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    GPS Plotter antenna location?

    I am installing a Standard Horizon GPS Plotter on one of my boats, they really don't give you much instruction as to where to place the antenna. On my other boats I always mounted the antenna on the roof, but this is an open boat with only a small area on the bow. I have an aluminum windshield...
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