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    84 Mariner 115 bogs out above 2000 RPM

    I have a Mariner 115, serial #6527950. It seems to have no power at all above 2000 RPM's. The carbs are clean, timing has been adjusted, stator, plugs and wires have all been replaced. The stator checks out fine for resistance, as well does the trigger. (This according to the Merc Manual) It...
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    finding #1 TDC on inline 6

    I'm trying to sync the ignition and carbs, but am unsure about whether #1 piston is at TDC. I don't have a dial indicator, I was using the screwdriver method. I'm unclear about the 'dead zone', when the screwdriver seems to stop moving up until it starts to move down again. Is TDC where the...
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    grayish/brown greasy stuff from '84 mariner 115

    I have just rebuilt the powerhead on my '84 Mariner 115 inline 6. I now have this grayish/brown greasey stuff oozing out from the water inlet and around the prop. The powerhead was spotless inside, including the exhaust housing. Could it be water mixing with the gas/oil? I am running a 25:1 mix...
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    Can't get max rpm's out of Volvo IO

    I have a brand new Stingray 185LX with a 135HP Volvo IO. I was told that max rpm was between 4800 and 5200, but I can only manage about 4300 to 4400 at wide open. I'm running a 12.25 X 21 pitch prop. I'd like to keep the same prop. Is there any way to bump the hp up to get the prop to spin faster?
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    timing problem with 84 115HP

    I have an 84 Mariner 115HP, serial 6527950. I have rebuilt the powerhead, and now I'm trying to time and synchro it. Move #1 cylinder to TDC, but timing marks on flywheel are about 180 degrees off from the timing tab. I changed the crankshaft during rebuild, was told it was from a 115HP. What's...
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    bad fuel pump?

    I've been having trouble with my 83 Johnson 140 idling poorly. I just checked the fuel pump, and it doesn't seem to be pumping very much fuel. The pump is new, but how muck fuel should it pump? Also, the opening in the block that the "pulse" comes from is threaded on my engine. Is there supposed...
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    Johnson 140 won't idle

    I have an '83 Johnson 140. Anything below 1200 RPM and it doesn't want to idle. The compression has been checked, it's good. The carbs have been cleaned and rebuilt. My mechanic thinks it could be something in the recirculation system. He says the engine seems to be loading up with fuel at idle...
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    pistons frozen, need to remove crankshaft

    I have a '75 115HP Inline Merc. I want to remove the crankshaft to tranplant into another motor, but all six piston are "frozen" in the block. I don't care too much for the block, pistons or conn rods, but I do not want to damage the crank. Does anyone know any secrets to break the pistons free...
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    Need info on serial numbers

    I recently bought a Mariner 115HP and a Mercury 115HP, but I don't know what years they are. The Mariner serial number is 6527950, and the Mercury is 4117155. Any info would be appreciated. Thanks
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