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#1
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I have two 86 150 Yamahas on my 250 Sportsman. As far as electrical problems the only problems electrical i have had are the oil injection black boxes. First one tank started overflowing and then the other tank on the other motor began overflowing. We ended up trashing the whole injection system and going to premix. Probably a good thing to do anyways. Other than that they are very reliable motors. They never skip a beat and as long as they have fuel they will run. (i probably just jinxed myself, i will let yall know tomorrow if they still run)
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1983 V-20 capsized. . . . in the garage. 
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#2
02-15-2011, 09:55 AM
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my 87 did the same on the motor tank, i had to buy a new float for $130 yamaha parts don't come c heap!! but i still own one
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1986 V20  Old Fishermen never die, we just SMELL that way!!
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#3
02-15-2011, 01:12 PM
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Hi jasoncooo I dont want to steal this thread but can you give a step by step of how you removed the oil injection,, I know yamaha's oil injection system is more invoeled then merc evinrude and johnson ..I think when you get to disconnecting the alarms is where it becomes a pain ,,also did you replace the pump or use a home made blank
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#4
02-15-2011, 07:18 PM
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When i de-oil-injection-systemized my outboards i just unplugged all the connections and hoses then pitched the tanks out. I also had to take the oil injection pump off and take the worm screw gear drive out then put the pump back on. I plugged all unused hoses with 1/4 bolts and clamps
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1983 V-20 capsized. . . . in the garage.
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#6
02-16-2011, 07:40 PM
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No i left all the hoses that run to the carbs from the oil injection pump attached. ALso the engine oil tank has a float sensor on it. I had to take the sensor apart and use a piece of 3/8 hose to hold the float at the "full" level. This keeps the thing from screaming at you about being low on oil.
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1983 V-20 capsized. . . . in the garage.
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#7
02-18-2011, 06:37 AM
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That mechanic sounds like he is trying to sell you that 99 mercury, which is priced on the high side. I would run far away from that guy and lose his number. Yamahas are great engines 2 stroke and 4 stroke. I really do not think that guy has any idea about what he is talking about. Mercurys are real good motors also his just seems a bit high, and he sounds like a d.a..
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