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  1. S

    15hp Evinrude exhaust maifold

    I just replaced the inner exhaust manifold on my 1976 15hp Evinrude because it had a hole in it and was leaking water into the cylinders. It went together fine, but when I started it and ran it I still had water in the cylinders. It looks like the water pushed the gasket out of the way and went...
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    1985 Merc 115 runs rough

    I have a Merc 115 6 cylinder. It was running rough as you gave it gas, it starts to surge. It runs good at 3/4 throttle but when you open it up it breaks down. I read in the Seloc book that it is a fuel problem. I have cleaned the carbs,rebuilt the fuel pump, I switched the gas lines and ran it...
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    Merc 1985 115hp Fuel Pump

    I have a 1985 Merc 115hp inline 6 that has a fuel problem. I plan on rebuilding the carbs and replacing all the fuel line because of age and this new gas. I was also thinking of replacing the fuel pump with an electric Airex pump. My question has anyone done this with their motor and is it a...
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    1985 115hp merc skipping at full throttle

    I have a 1986 Merc 116hp l6 that runs good at idle and 3/4 speed but when I go full throttle it starts to skip, I thought it might be a fuel problem so I ran it off a 6 gal tank it nothing changed. It was running fine the week before. It still starts right up and runs OK until I go over 3/4...
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    Johnson Ignition

    I have a 1976 15hp Evinrude en I have a 1976 15hp Evinrude engine that has points and condenser. Does anyone know of a company that makes an electronic ignition modual to replace the points and condenser?
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    115 Merc Carb

    "I have a 1986 115 merc. I los "I have a 1986 115 merc. I lost power yesterday so I went to the dock.When engine in running gas is coming out of the vent hole on the top carb. I tried running it out of gas thinking the float was stuck. This did not help, when I go to prime the carbs the gas...
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    Mercury

    I am buying a 1986 merc 116 in I am buying a 1986 merc 116 inline six serial # A940390. Was this built by Mercury or Yamaha?
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    Starting voltage 115 merc

    "My battery reads 12.2 volts, "My battery reads 12.2 volts, so do the red and white wires on the switch box. When I crank the motor the white and red wires on the switch box go down to 9 volts or a little under. The trigger brown wire is going down to about 8 volts. Can this prevent the motor...
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    Switch box voltage

    "On my 1978 merc 115 is there "On my 1978 merc 115 is there any way to measure voltage on a switch box going to the coil with a multi meter. I have 12 volts going into it and 9.8 when it is cranking. I also have 7.5 coming from the trigger to it on the other side, but I can't measure anything...
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    Ignition switch on a 1978 115hp Merc

    "When I was trying to start my "When I was trying to start my motor, the motor would crank and I get nothing. If I crank it and turn the key back slowly the motor starts to catch so I think it is the key switch. I opened the control box and the wires to the switch are pretty punky on the ends...
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    1978 Merc Exhaust Cover

    I am replacing the exhaust cov I am replacing the exhaust cover gaskets on my 1978 115 hp merc.Do I put the gaskets on dry or is there some type of sealer I should use. The old gaskets look like one was dry and the other had some sort of sealer on it.
  12. S

    115 exhaust cover

    My 1978 merc has water in the My 1978 merc has water in the bottom cylinder. My mechanic says it came from the exhaust cover gasket. The compression is 120 in the top 5 cylinders and 90 in the bottom. I want to pull the engine and replace the exhaust cover gasket but I am worried the water...
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    Distributer trigger

    I just replaced the wiring har I just replaced the wiring harness on my 1978 115 hp Merc. I still have no spark. I jumped the switch box like it says in the book and it fired going to ground like it is supposed to. Does anyone know of an easy way to check the trigger? Thanks Dan
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    Wiring Harness

    "I just ordered a new wiring h "I just ordered a new wiring harness for my 1978 115 hp Merc from CDI Electronics. There are a few other wires that should be replaced but are not part of the wiring harness.What gauge and type of wire should I use to replace these. Thanks, Dan"
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    Switch Box

    I have been pricing a switch b I have been pricing a switch box for my 1978 merc 115. I have found a switch box by CDI Electronics #114-2986 that is the switch box and coil in one unit. Has anyone used one of these and how well do they work?? Thanks Dan
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    Merc 115 spark

    I have been trying to find out I have been trying to find out why my 1978 115 Merc has no spark. I have been tracking the voltage from the wiring harness to the switch box. I have 12 volts at the switch box but it drops when the engine is cranked. I pulled the plug from the side of the motor...
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    Merc 115 spark wires

    I just tried to start my 115hp I just tried to start my 115hp merc after a very heavy 3 days of rain. It sounds like I have no spark.So I was going to change the wires. I can think of no other reason for it to not start from dampness.When I pull a wire from the distributer there is a wax like...
  18. S

    Rough Idle

    I have a Merc 115 hp 1978 that I have a Merc 115 hp 1978 that runs rough at idle and seems to use a lot of fuel. Runs great at high speed but still uses a lot of fuel.Anyone have any ideas on how I can improve fuel and idleing?? Dan
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    Merc 115hp idle high speed

    I just put my boat in the wate I just put my boat in the water with a 115 merc 1978 inline 6 that I thought was running rough.When I left the ramp I still thought that it was running a bit rough but didn't sound that bad. When I got out and opened it up it ran great not a skip or a missfire.My...
  20. S

    Setting timing belt

    "I have a 1978 115hp merc outb "I have a 1978 115hp merc outboard. When setting the timing belt on the distributer am I lining up the flywheel on TDC and then align the marks on the distributer with marks on the fly wheel, the Seloc book is kind of vauge. Thanks Dan"
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