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    Yamaha F150 troubles

    Start the motor, run at around 1200 revs in neutral and pull off and reconnect one spark plug wire at a time. Listen and see if the motor changes how it is running. If all cylinders are good, the motor should run rougher or slower when a plug wire is remove. If one or more cylinders when...
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    1996 Grady gel coat touch up

    You can get gel coat in the original color from Spectrum Color. That said, it won't match since yours in most likely faded. Matching color is art. There are video explaining how to match. Andy at Boatworks Today YouTube channel has a good video on matching gel coat. Just be aware that before...
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    Water in gulfstream

    How is it stored when out of the water. There will always be some flow of rain water into the bilge. Common areas for water to leak in are anchor lockers assuming yours normally drains into the bilge. To that ad deck plates, drink holders, etc. Depending on the orientation of the hull when...
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    Water in gulfstream

    Do you get water when the boat is not used? If so do you get water all the time or mostly after a rain event?
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    New Batteries

    I am not so sure it is the switch. One battery worked before you replaced both batteries and now neither works? Turn the switch to BOTH and see if the motor cranks over.
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    12v or 24 system

    Well at least you are not crazy
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    New Batteries

    There should be a battery cable connecting the negative terminals of both batteries together. You may have left it disconnected.
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    1999 Yamaha XO 66 250 Service Manual

    I have an electronic copy of the S250 1999 manual. If you post or message me with your email info, I will try to send it. The file is 12 Mb and some email servers may have size limits.
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    1999 Yamaha XO 66 250 Service Manual

    Is that the correct model number?
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    8 original hours on 2008 GW and Yamaha 200 questions

    My advice is to spend most of your time looking for issues with the hull and mechanical things and assume that the engine has major problems. It may not be but you won't be able to easily tell. One of the worst thing to do to a boat is not use it. If the boat is priced where it would be if sold...
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    ignition protection

    One thing not mentioned is that the new motors may draw more current than the old motors did when cranking. In that case, it is possible that the wiring is undersized. There are amp probe type of clip on meters that can measure current. Just knowing the current is not enough though, you need to...
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    ignition protection

    The issue is voltage drop on the accessory buss. That can be related to many things, the more common being weak batteries (a load test can confirm), Confirm that you have the correct type and capacity batteries. bad or corroded connections in the connections, fuse receptacles, battery switch and...
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    Battery Conditioner Recommendations?

    I should mention that whatever source you connect to for power to the charger should be ground fault protected for your safety. If you plan on getting your power form a shore power setup, that probably does not have fault protection. You might need an adapter like this...
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    300 with 2 mfd

    Is the boat a Marlin 300? If so, what year? Based on what I have seen for newish years of Marlins, two 12 inch screens will fit. I don't think 2- 16s would
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    Does the 300 model have a drain in the anchor locker

    I would expect a drain. Typically there is either a hull drain out the side or direct drain to bilge. If the former, you should see a small clamshell fitting on the hull near the locker above the water line. Some models drain the locker by routing water into the bilge. In that case it may be...
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    Transom thru hole

    Save the old gaskets and use them with the new ones to add some space between the flop and the tube edge.
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    Battery Conditioner Recommendations?

    Here is a NOCO receptacle, that accepts a plug from the charger(no cutting the plug off). The unit is basically water proof on the outside and is less expensive than Marinco. I Believe it comes in black or white...
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    Seaport Blue

    Is the hull gel coat or is it paint?. I suggest you call Grady support and tell them your problem. The whitish stains are odd but may be amine blush which would be an issue with hull prep prior to painting, color,gel coating or during hull layup. The issue may be covered by the hull warranty...
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    Gel coat repair 228G 1994

    You didn't say if the areas were smooth or if they are non skid. The later is more difficult to repair but it is possible to replicate the pattern. You can get patch paste from Spectrum Color for your hull but after all these years, it will not match. You can go nuts matching the color using gel...
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    Circuit Breaker

    It looks like your accessory feed that supplies power to just about everything except always hot loads like auto bilge pumps. You can't easily trip it using the button. That is for reset if it pops. If you shorted out the positive and negative feeds to your fuse block, it should pop but I don't...