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    gauges wont work

    1985 thundercraft 16 ft 140 hp mrec i o. none of the gauges work>? dont know where to start, i dont see a fuse panel ? what should i do?
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    overheating?

    16 ft 1985 thundercraft 140 hp merc I O engine runs fine for 30 or 40 minutes then stalls and wont start? it has both gas in carb, and spark at plugs. after 10 or 15 minutes it will start again. could it he a overheating problem?cant check gauge, none of the gauges are in working order. how...
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    runs great then dies

    1985 thundercraft 140 hp merc I O runs great 15 or twenty minutes then stalls, wont start. gas to carb ok, spark at coil, had electronic ignition installed last year. new plugs, wires, rebuilt fuel pump ,rebuilt carb, cleand gas tank installed all new filters, and installed exra one on top of...
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    remove gas tank from io

    ok here we go again dont know where to start i need to remove and replace 25 gallon gas tank from the bow, 1985 thundercraft 140 hp mercury io already siphoned all the gas disconnected lines now what?:confused:
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    nut on gas tank w/pics

    1985 16 ft thundercraft i o 140 hp screw on top of gas take turns then binds, only about 3 threads come out, i am afraid to strip it, or break it. anyone have any suggestion?trying to check screen on pickup line inside. well now it wont screw out or in, it turns and is still tight fit. i hope...
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    filter on fuel vent???

    1985 thundercraft 16 ft 140 hp merc i o i removed the gas tank vent hose, it has a inline gas filter on it (one way) why in the world would that be there? it has a date on it 1982 at least i think its a date . the engine runs for about 15 minutes then seems gas starved . could that be the...
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    remove nut from gas tank

    1985 16 ft thundercraft i o 140 hp plastic type screw on top of gas take turns then binds, only about 3 threads come out, i am afraid to strip it, or break it anyone have any suggestion?trying to check pickup line inside.help :confused:
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    help engine stalls

    1985 16 ft thundercraft 140 merc I O rebuilt carb, rebuilt fuel pump, new coil, ignition,new plugs, replaced fuel lines cleaned fuel tank, replaced fuel seperator. took her out today she ran great for 15 minutes. came back to dock, it started running rough, then stalled, would not start?what...
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    change filter in gas tank

    16 ft1985 thundercraft 140 merc i o i have changed the fuel lines, now trying to replace filter inside gas tank i broke the nut loose on the line comming out of the tank, but it wont turn only about 1 inch i am afraid to break the tank.it also has a barbed fitting on top of the nut that wont...
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    replace fuel line

    16 ft 1985 thundercraft 140 hp merc i o engine bogs when full throttle replaced the water seperator rebuilt fuel pump.rebuilt carb ,changed filter at carb. took it out today ran fine got up to plane then on the way back bogging again i dont know what else to do except change the fuel line maybe...
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    boat trailer lights

    i have a 16 footer. my right trailer light is not as bright as the left one. both lights appear to be the same except the right one only has two wires were the left has three? am i missing something here? i thought maybe i had a bad connection somewhere ?
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    drain plugs

    another dumb question 85 thundercraft 140 hp merc io trying to winterize. how many drain plugs, and where are they located. i bought seloc book but it doesnt show there locations?
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    what size trolling motor?

    i am new to this. what size trolling motor would i need i have a 16 ft thundercraft with 140 hp merc like to have a way to get home if it dont start lol
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    gasket for bell houseing

    1985 thundercraft 140 hp merc i o. if i open the bell houseing to check for water or check the bearing is there a seal or gasket i must replace afterward?like to have everything ready to go if i do
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    winterize merc 3.0

    1985 thundercraft 140 hp merc io can i just drain the three drains without connecting muffs and antifreeze .spray light coat of oil and cover it for the winter?or must i run antifreeze thru it?
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    stalls in gear

    1985 thundercraft 140 hp io started out with boat would not start. was told to drain gas, (bad gas) change all filters. which i did.replaced carb inlet filter, changed water seperator, rebuilt fuel pump(with new filter) changed coil.new plugs. it now has spark as it starts every time, when i put...
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    gimball bearing

    16 ft 1985 thundercraft 140 hp merc io i heard a klunking noise when turning engine off, my friend told me it is the gimbal bearing getting ready to go. is this expensive repair? can i do it myself or does it go in to a shop? thanks
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    electronic starter

    1985 thundercraft 140 merc i o. my friend told me i should install a electronic starter . i never heard of it . i have heard of electronic ignition.he said i would never have a starting problem again.i dont want to appear stupid but is there such a thing?
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    coil question again

    85 thundercraft 140 mec i o i have no spark at coil i ran jumper from battery to + side of coil, still no spark, i replaced the coil and condenser still no spark . one thing i find odd is i have voltage on negative side and positive side of coil? i need help lol
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    coil wires

    1985 thundercraft 140 hp io HELP my friend was helping me get boat started and removed 4 wires from coil. red/black/green/ whiteyellow. i have book from seloc but its has grey wire, i know the red is positive, and black is ng ,not sure on green and whiteyellow? i dont want to burn up any wires
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