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    2004 mercury 250sx rigging

    Crowleymarine should have rigging info for that motor. You could get the model numbers for the control and search the web for a good deal. When you say steering assembly, what do you mean? Most steering is pretty universal for OBs since the 80's.
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    New Controls Swap

    Mercury motors used the same mechanical controls for many years. i.e., I used my '76 MerControl on my '93 Merc V6. I needed to graft the wiring however. So any Mercury-compatible control you find, should work with your motor mechanically. You will obviously want one that works electrically...
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    Draining gas tank questions -- Is this thing a vent? How does my tank look in general?

    You do not need to check the tank for leaks annually. Whenever you get a chance is good, like now when you want to drain the fuel, and it looks like it is pretty old and corroded. If the tank is starting to get corroded areas on it's bottom and losing the thickness of the orig aluminum. you...
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    Draining gas tank questions -- Is this thing a vent? How does my tank look in general?

    Jimm, The aluminum tanks will develop pinholes on the bottom of the tank. It is best to drain the tank, pull it out and inspect it for corrosion. Most boat builders stopped using aluminum tanks in the early 90's so your tank is likely pretty old. Another reason to inspect it. If it were me...
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    New Winch or Winch Strap?

    The sun rots out the winch straps. You can replace them periodically with the same or once with a galv steel cable in freshwater or SS cable in saltwater. Smaller boats can use nylon rope, which lasts quite long. You do have a safety chain from the winch stand to the bow eye, right?
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    1985 Mercury Black Max oil alarm >3k RPM

    Actually, the early Merc V6 motors had the low amperage stators, usually with unregulated charging systems and full wave rectifiers. Merc then went to a single 40A stator/VR, and finally (by 1993) the V6 Mercs had twin 20A Stator coils and VRs. I do not think the stator is your issue, however...
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    First Successful Outing On The Lake

    OK, to set the shift cable on that motor: Set the MerControl to neutral. Remove both shift and throttle cables from their clamps. Move the shift slide to about the center of it's travel. It will "click" into neutral. Now adjust barrel nut on shift cable until cable will connect to the...
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    Trim pump question

    Joe, unlike most PTT units, yours likely has the teflon seal, vs a rubber oring on the brass piston. The parts diagram shows it as item #10, piston seal. Also notice, that the cylinder liner is removeable and the piston unbolts from the trim rod. That is very useful when the piston seal is...
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    Trim pump question

    The Spanner tool is easy. I made one out of 3 bolts and two 6" pieces of angle iron. They are also avail on the internet for a few bucks. You need the dia of the holes to order the right one. The rebuild kit has the teflon seal and a bunch of orings and a wiper for the trim rod. The only...
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    Need Help With Trim/Tilt Wiring

    Another note. When you buy a replacement PTT motor for a 3 wire system, it often comes with a 2 wire PTT motor and a new wiring harness and relays. You may be able to buy the wiring harness separately. ARCO and Sierra are two of the more popular brands of replacement PTT motor.
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    Trim pump question

    I doubt filling the reservoir had any bearing on your PTT system. The reservoir is open to the air and self-bleeding. You should be using auto trans fluid or SAE 5W-30 motor oil, whatever the unit already has. The special tool is kinda like a funnel which has a small taper. It compresses the...
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    Mercury Oil Injection

    Fuel mix ratio is 50::1 on that motor. To delete the oiling system, remove the oil pump and then the drive shaft for the pump. You can reinstall the pump and loop the oil line or find a block off plate. Sack the oil injection warning module and idle stabilizer. Test the overheat alarm by...
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    Trim pump question

    That motor should have the PTT pump/reservoir in the boat. The vent screw has no impact on the PTT pressure. It should be a bit loose to let air in/out of the reservoir. When those systems leak down it can be the control valve or the piston seals in the PTT cylinders. Most often it is the...
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    Need Help With Trim/Tilt Wiring

    Here is a generic wiring diagram for PTT for Johnnyrudes. https://maxrules.com/graphics/omc/wiring/TnTwiring.gif It shous how to wire the relays and the rest of the system.
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    Challenging loading

    There are two speed winches. The "low" gear makes it easy to load heavy boats. They are a lot cheaper than an electric winch.
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    Seaswirl throttle removal

    Put the throttle lever in near full reverse, and look for a slot in the throttle arm, at about the 8-9 'o'clock position. There should be an Allen set screw holding the throttle arm on.
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    Power Tilt Conversion

    I do not know what to suggest for your question #1. You would need a midsection with a newer PTT unit that still fits your powerhead. They may exist, who knows. As for Question #2: You need a single pole, double throw switch of about 5A, plus one or two solenoids. The PTT pump/reservoir...
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    80's 150HP black max problem (won't run when shifted)

    PK, Noo, You have different symptoms. You might start your own thread with all the observations you have.
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    So, my 2025 Bayliner VR5 200 hp 4.5L mercruiser STILL barely pulls me up

    I think your boat is a tail dragger. You are not alone, as many are such. It gets worse for larger craft. A lot of boats up to 24 ft boats have SBC power. On those cruisers, you need to send everyone into the bow portion of the boat to get on plane. Once there the boat performs well...
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    1979 9.8 Carb Bowl

    I used something similar to seal the gaskets on my fuel tank sender. It seems to hold up. Hopefully you have the same luck. I am concerned about you not being able to find a carb bowl seal that works. Is it possible that you got some old stock (pre-etoh) when you bought the new gaskets? The...
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