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I have a 2003 mariner 200 efi it is autolube feed from a large tank when i start very smokey so i left the leg down for 2 doays trimmed it up and oil dripping from g/box i smelt it and 2 stroke must be coming from exhaust is there a small valve that should shut off whilst not running but now jammed open so floods because of the presure from the autolube tank

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  • greggilbe338 Mar 19, 2011

    no this is 2 stroke oil not gearbox oil,this comes from outside the engine not g/box from the barrels down the exhaust which leeds to the prop which is housed in the g/box i am fully competaint to strip down engines or pumps as obviously this is coming from the 2 stroke pump.i hope this isnt gonna cost me any more money for an answer.

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My guess is the diaphram on the oil pump is bad. THE OIL IS INTRODUCED THROUGH A DIAPHRAM STLYE FUEL PUMP MOUNTED ON THE PORT SIDE OF YOUR MOTOR. You can disconnec the oill tank and run the motor for a few seconds to clear the pump then try connecting it again. There might have been a siphon started from a weak diaphram. Too much pressure from the tank can riun the diaphram causing it to leak into the motor. You should disconnect the oil tank when the boat is stored to keep pressure of this. You can replace the pump which is expensive or disconnect it and mix the oil in the tank. Most people do this after they burn the motor up from a bad oil injector. When I get this for rebuild 9 out of ten disconnect the pump. When the oil is mixed there is no doubt your getting the correct oil at all times.

Posted on Mar 19, 2011

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You have to open gear box and reassemble it. There is a alignment problem of gearbox with fly wheel. Please call a mechanic. You will not be able to do it yourself.

Posted on Mar 18, 2011

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Engine tank should be plumb full tight. The engine supplies about 2 lbs pressure through one of the 2 lines going to the boat tank. The other line takes the oil to the engine tank. If that line gets kinked or pinched, the engine tank won't get oil, a check valve lets a little air into it, and the oil pump keeps getting oil. When it goes down just a little, the alarm goes off telling you something is wrong.

Sludge in the boat tank could plug up the pickup screen. I've also seen them plugged up by a foil oil bottle seal carelessly dropped into the tank.

Once you find out why the oil couldn't get there, start the engine with the cowl off and loosen the cap on the engine oil tank until it leaks, then tighten it down and clean up the mess. That tank is normally plumb full tight.

If when the engine is running, you crack the cap on the boat tank, you should hear pressure let off. If the cap leaks, it won't build up pressure. If there is pressure, the oil line is plugged or kinked.

If pressure isn't supplied, the problem would be the crankcase check valve on the engine, lower forward starboard side, with the hose going to it.

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Just started my suzuki 4 hp out board after long lay up engine starts and runs but only if choke left out is a bit smokey and oil in water drum


before you go ant further it will need a new impeller in the water pump---long periods of inactivity allows the blades to perish in a position and when started they tend to break of followed by the rest at a critical time
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