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    Help identifying 40 hp mercury

    Just purchased a pontoon with a 4 cyl 40HP mercury. Not having much luck finding year so I can purchase a book. Serial # is OD054363. Any help would be appreciated.
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    fuel gauge problem

    I have a 20 gallon fuel tank in my boat and the fuel gauge does not work properly. If I remove the sending unit and move it manually everything works. I have put the sending unit in a bucket of water and the float is good. I install it and the gauge reads empty. I have tried to re position it...
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    runs well at slow, not higher speed.

    This motor is running fine at about 1000-1500 rpm. I try to accelerate and it bogs down. only have been in water twice. after first time i checked compression, changed all 6 plugs and added a water separator filter. I could not figure it out so I dropped it off at a shop. Not sure what to...
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    in process of removing oil injection NEED HELP

    I have removed the oil pump and I have the blank off kit. How do I get this piece out so the blank off kit will go in. I have turned it with a screwdriver, attempted to pull out with needle nose. What should my next attempt be?? I also removed the top tank and will remove the on board tank and...
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    how do I remove oil injection from mercury motor

    I recently purchased this boat and the oil injection appears not to be working. I am running off a premix tank and every time I put oil in the main tank and run the motor the oil siphons out and runs on the ground after I am home. I replaced the 2psi check valve and still runs out the vent . I...
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    engine running poorly

    My 1993 150 HP mercury is running poorly. Seems to run about 1/2/ throttle and no more. alarm going off, running on premix 6 gallon tank for test. It runs for a few seconds and shuts down shift to neutral and back to fwd and off she goes again. I am going to check compression and spark in the...
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    problems with new to me mercury

    first not getting air to remote tank to push oil to the engine tank on the oil injection system. Next tachometer is not working. eng is charging the battery at 14.6 volts. the tach moves a little but never goes up to 1000. I will check wiring under dash. previous owner had everything jury rigged...
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    Oil injection

    recently purchased this boat with a 150 mercury outboard. It has a large abt 2 gallon oil tank under rear seat and a small tank on engine. I put a gallon of oil in the tank under the seat. Installed a new cap on the engine tank. have not had the boat out yet and just started it at idle on muffs...
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    cleat on deck

    Just purchased a 1989 hurricane. It is fiberglass and on top looks like a pontoon. One cleat is broken. I purchased a new one and attempted to remove old one. screws spin like there is a nut on the bottom. There is no way to get under it to check. Anyone have experience that could help me out...
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    Oil injection wiring

    Just purchased a Hurricane with a 1993 mercury eng. PO had put a boat plug in the oil tank on top of the engine. he has a black and a blue spliced together just at edge of tank on the engine. I have ordered the proper cap and it has two wires and I would believe the two spliced wires go to the...
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    Oil injection cap for tank on top of engine

    Is there a part # or a link where I can purchase the cap for the oil injection tank on top of the eng. 1993 Mercury 150 XR6 thanks for any help.
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    Oil injection

    Just purchased a 1989 Hurricane with a Mercury 150 which is a 1993. it has a oil injection tank on top of the motor and also a couple gallon tank under a compt. previous owner says oil injection works . it also has a 17 gallon fuel tank. Is there any way to check oil injection and should both...
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    need year from serial #

    I just purchased a 1989 Huricane and it has a mercury 150 XR6 and serial number is OD198657. Can someone help me with the year. I am interested in trading for a smaller motor. Maybe 70 or 90. Need to know year first. Thanks
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    Battery selector switch

    This boat is new to me and it has a battery selector switch. I have a starting and a deep cycle battery. Are there any directions on how to wire the selector switch. It has 1, 2 off and both positions. Thanks for any help.
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    tried to show wife how good the boat ran

    Well as the story goes I purchased a boat (1984 Yar Craft) had been sitting 7 years in a garage. 1984 johnson. had carbs rebuilt and I lake tested it and it was great. Took wife to show her how well it ran and could not get away from the pier. Took it home and removed cover, started on hose...
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    gas cans and hoses

    I just got the Johnson 90 running and after I let it set it drips fuel at engine fitting and the fuel can seems pressurized. I see no vent. are the caps automatic vent? 2 metal tanks both using same hose. should I replace hose fittings or is there likely a problem with the tank pressure.??
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    1984 90 hp johnson will not run in water

    new boat to me. boat has been in a garage for at least 10 years. cleaned and rebuilt carbs,replaced 2 fuel lines that were leaking. removed the VRO by disconnecting wires at motor and plugging oil line. runs fine on hose. idles about 800 on hose. in water first time yesterday. never left the...
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    1984 johnson 90hp carbs

    I removed the carbs and cleaned them including removing jets and reassembled. Motor starts and idles fine but I think rpm is too high. Only on a hose.. The bottom carb leaks fuel out the air intake when not running. I will remove the carbs again and check out the bottom one. I think this means...
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    starter 84 90 hp johnson

    When I attempt to start the motor the starter spins but does not always engage. If I turn the starter by hand and raise the gear up it starts every time. This boat has been sitting for about 8 years in a garage. Starts and idles good on hose. Am I looking at a new starter or maybe a good...
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    1984 90 hp johnson VRO

    Should I remove the VRO on this engine and just premix. How difficult is it and are there any instructions available? Thanks
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