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04-21-2023, 08:14 AM #1
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1998 mercury 200 carbed no power under load. Need help.
Forgive me if I am posting this in the wrong spot. I am new to this forum.
my 1998 mercury 200 carbed ran great for about 6 hours this weekend. Towards the end of the day the motor would not rev to past 1500-2000 rpm while under load / in gear. I believe it's a stator / switch box issue but I'm not sure how to properly diagnose and pinpoint the issue. Engine serial number 0g595896*
Motor idles fine. Revs in nuetral fine. Engine running voltage is 14-14.6 volts.* Ruling out bad gas because motor ran grear under load for first few miles / hours of day.*
I have some ohm readings between some of the wires coming off the stator.*
brown wire yellow sleeve to purple wire black sleeve*
purple wire yellow sleeve to white wire black sleeve*
white wire yellow sleeve to brown wire black sleeve
all read 1167-1169 ohms within the trigger ohms spec according to my SELOC manual.
I additionally individually ohm tested the blue and blue /white wires from stator to ground. Both were open.
the red and red/white wires from stator to ground were 100 ohms. Not sure what this means?
Visual inspection of stator looks like I have one burnt up coil but i notcied that last season and boat did not have any problems running. This outboard is not new to me I have run it 30-40 hours without an issue
Any insights or additional testing would be great. This is my first outboard.
I have been an automotive and light duty diesel Mechanic for 10 years so I have some experience in R&R. Just not sure where to start on an outboard.
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