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    2003 Johnson 150 port temp sensor

    The 2 wire temp sensor also controls the Quickstart function, which advances the timing until the motor warms up. The fact that you do not get a temp alarm is worrying.
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    Boat ladder

    I hate when boat OEMs do that. My neighbor's 27 foot BW Outrage has that issue. Can you drill an access hole thru the cap, to install washers and locknuts? There are a variety of plugs, hatches etc, to cover the access holes, to clean it up. You really want bolts......
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    98 Mercury 150 running issue

    OK, I am out of SWAGs. Black plugs mean rich combustion or no fire, in my experience. Your carbs have a single float chamber, so flooding would affect starboard side of motor. It affects the top two port cylinders, so potentially two carbs, but only one barrel each. OK, one more SWAG...
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    Mercury 1150 115hp(1977 I believe)

    My IL6 had a block part number near the crankcase seam on the transfer port side. If that motor has one, and you can find the old parts diagrams, maybe you can match it up.
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    Johnson 50 blowing Solenoid fuse?

    Those fuses blow when the battery power is shorted to ground. The evidence points to a short in the remote. Look for the yellow/red (solenoid) wire touching the metal case of the remote. If the purple wire shorts to the metal it can also blow the fuse.
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    Steering bracket help 1959 lark 35

    I suppose you could compare the throw of your steering system with others, but yours looks to be adequate. It is certainly fine for high speed. You look to lose some real slow maneuvering ability. If you find that other steering systems give more throw and you want so replace it...but I think...
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    winner project

    I had a similar boat. It had a bench seat in front of the splashwell, with fuel tanks under it. Not a bad setup as it allowed a good amount of room in the cockpit. it had 2 back-to-back seats. It has marine vinyl covering the deck. Durable and non-slip. We had a Merc 850 on it, and it was...
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    Recovering Boat Seats

    I think you did the correct thing. Captains chairs, back-to-back seats and others are pretty complicated, compared to their relatively cheap purchase costs. This is because they are mass produced, and very common in design. The cushions that you did were pretty simple, but custom sized. They...
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    Prop swap lost 10 mph

    OK, SWAG time. Is the new prop installed correctly? The hub is pushed fully into the housing? The thrust washer is installed correctly? The OEM did not change the thrust washer? The nut is properly tightened? When you say prop bore sleeve, you mean an adaptor to make the prop hub fit...
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    Wonder if I should go IO again or go OB?

    OK Nick, I'll bite. Why are I/Os better for tubing? Alternatively, We will see if you change your tune after you replace the stuff unique to the I/Os that breaks or wears out.
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    98 Mercury 150 running issue

    OK time for SWAG. Are the main jets in the port carb barrels on the top two carbs missing or loose? Did you use new gaskets when rebuilding the carbs?
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    98 Mercury 150 running issue

    Do you see grey deposits on the black spark plugs, or water droplets?
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    98 Mercury 150 running issue

    Black spark plugs indicate they are not firing. They either do not have spark, they are getting flooded with fuel or they have water in the cylinders. You might take a compression test and see if those two are low.
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    Mercury 1977 200HP with exteral Trim/Tilt motor inside boat mount.

    You could put a bulkhead in front of the transom. They acted as a splashwell, but were removeable. With a tight fitting frame, they kept any splashed water under control. You would obviously need a bilge pump. The port side has a nice "bump in" that could hold the bulkhead. I do not see a...
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    Prop swap lost 10 mph

    Some props hold the water better than others. What is the difference in design between the two props?
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    Adding another rectifier

    Gee, what is the charging capacity of your motor? no more than 30A. I would think, so, say 15A most on the second battery, 10AWG wire gets it, plus some extra.
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    Steering bracket help 1959 lark 35

    Does the motor turn the same amount in both directions? if so, you are probably rigged correctly and the steering system is what it is. If the motor turns more one way than the other, you may be able to adjust the steering cable length where it clamps into the holder. It also looks like...
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    1989 Sea Ray 160

    One more thing. If the fuel drained back into the built in fuel tank, it is likely the anti siphon valve on the fuel tank has failed, or doesn't exist. A-S valves act as another check valve for the fuel system. A-S valves are usually located on the fuel pickup fitting. You should have a...
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    Adding another rectifier

    I am not sure if that would damage the regulator or rectifier. It will cause you to modify the wiring, possibly leading to corrosion or other wiring issues. I do not think a second rectifier provides any advantage however. A rectifier is simply a set of diodes that allow AC voltage and...
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    Mercury 1977 200HP with exteral Trim/Tilt motor inside boat mount.

    Gee, it looks like you have it in a good spot now. The splashwell (you will have a splashwell?) will cover it fine. I am not an expert, but a splashwell in at least the center will keep a lot of water out of your boat. I presume that motor is LS? Splash happens. There used to be a bag...
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