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  1. S

    Stator?

    Issue solved. Thanks Dukedog for the manual. The specs from the manual confirmed my stator was good, and the wiring diagram helped me rule out anything that may damage my new rectifiers. Installed the new OEM rectifiers and it works perfectly. Lesson learned, after market parts can save...
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    Replaced stater and rectifier, still no spark in one cyl

    Did you test the compression?
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    Stator?

    Pulled to boat out of storage and want to address my rectifier issue. Am planning to purchase OEM rectifiers but need a tip on testing the stator charging circuit so I don’t damage expensive rectifiers. Two sets of yellow wires from the stator. Do I test the ac out put yellow to yellow or...
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    1995 yamaha 200 hp v6 2 stroke trim tilt motor

    Removing the entire unit, with the motor off the boat is a preferred method as the other posts have suggested. It can be done as I suggested without removing the engine but may not safe enough time to make it worth it. if you have access to a cherry picker or chain block to lift of the motor...
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    1995 yamaha 200 hp v6 2 stroke trim tilt motor

    If you can tie off the motor in the up position, unhook the top of the ram from under the power head (can’t remember if it’s held in with a drift pin or c ring) loosen the manual screw (on the trim unit) to manually push the ram down, then you can tilt the trim motor back a bit more to reach the...
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    2008 yamaha 150 no start

    Test you motor ground. When you confirmed 12v to your starter solenoid did you use the motor block as the ground? Bad ground on the motor would cause your symptoms. If bad ground, the negative battery lead connection on the battery is often a culprit. Make sure it’s clean. When you say the...
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    Stator?

    I have a Mercury 150 EFI 2 stroke. The tach stopped working prompting me to look at the rectifiers. They were both shot. I replaced both rectifiers and ran the motor at an idle. My multimeter confirmed the voltage at the battery increased when the motor was running and the tach was working...
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    Yamaha temp gauge

    I have a 2006 Yamaha 9.9 four stroke. The layout of my boat does not permit me to see the motor from the helm. I had a plastic bag or kelp cover the water intake while trolling and the motor heated up, it was undetected until I heard the motor reaction to running hot. To avoid the motor ever...
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    Yamaha Starter draw

    I have a yamaha OX66 200hp two stroke. I have just rewired the boat. I upgraded all of the wiring. I have two batteries both batteries have a 4 gauge leads to the battery switch and 4 gauge wire from the switch to the outboard. The marine shop suggested I add a fuse at each battery. I added...
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    Yamaha outboard wirring question

    I have a 2005 Yamaha OX66 200HP and was looking for a wiring tip. The Yellow wire from 703 control box has 12 volts when the key is on but when you turn the key off the yellow wire still has 5 ish volts and holds. When I unplug the pink wire off the signal buzzer and re test the yellow wire has...
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    Merc 25hp EFI - Water Blockage

    (Model F25ELPT, serial 0r374682) With thermostat cover & thermostat removed as well as lower unit off I can't get water to flow up the water tube. One of the ports under the thermostat cover seems to be blocked as well, I suspect a blockage around the top of the water pipe causing the issue...
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    94 Yamaha 150hp oil injection

    I purchased a 1994 Yamaha 150TXRS, Good compression, good seals, nice shape. Before I ran it, I noticed the link rod for the oil injection was missing, upon further inspection I found that the drive gear for the oil pump was also removed. I ran the motor using mixed fuel, runs great. I wish...
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    Force Timing Advance

    I purchased a used 1996 120hp force outboard. After 6 months of use It started running very rough. I found it to be a blown head gasket. After replacing the head gasket it ran perfect except for the fact that the idle was now increased to 1100 rpm. After ruling out control linkage and carb...
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    Idle adjustment

    I have a 1996 120hp Force outboard. Ran perfect till last week then started running rough so I flushed the fuel, changed the fuel filter and cleaned the carbs. Upon further inspection a bad head gasket was my issue. I replaced the head gasket and it fixed my issue however the idle for some...
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    Yamaha Oil Injection

    I just purchased a 1994 150hp Yamaha Saltwater Series outboard. ($1800 including controls) (Model TXRS) 120 compression across all 6 cylinders, lower unit seals good, good spark, very clean. All and all seems to be a good motor. I have not run the the motor as it was not an option at the...
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    9.9 Yamaha Water Blockage

    Re: 9.9 Yamaha Water Blockage Problem solved. Taking things apart helps understand how they work and makes troubleshooting much easier. Turns out my issue was not the water pump. The blockage was under the exhaust cover. The cooling path: Intake in lower leg, Water pump, water tube, intake...
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    1977 Thunderbolt 850 compatibility with New merc control box

    (Motor: Year 1977 , Make Merc, model 1850527) (Control box: Year 2007ish Mercury side mount) I have been reading posts and looking at wiring diagrams from the 1977 85hp merc and the new merc control box. Looks like it should work however the old motor does not have the 4 gauge 12v lead running...
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    Merc control box

    I have a friend with a new mercury control box and cables and he is looking to use it on an older merc motor late 70"s early 80's. On my Yamaha I had to make adjustments to the box in regards to the shifting being pull vs push. Could this be an issue on my friends merc. I will explain to him...
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    9.9 Yamaha Water Blockage

    Re: 9.9 Yamaha Water Blockage I figured the education factor is worth the cost of a new head gasket so I puled the head off. I cleared out most of the passages but I assume my issue is where the water is entering the water jacket. The intake on the bottom of the power head is at lest 5/16 and...
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    Is all Gauge Wire the same?

    I need to run heavier wire in my 21 ft boat from the batteries at the back to the panel at the front. As I have accumulated more electronics the 12 gauge wire I have now has too much drop in voltage under load. I am planning to run 4 gauge wire. I priced it at the marine shop for $3.75 a...
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