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  1. JT!

    1969 merc 65hp flywheel broken?

    the flywheel has a hub in the center with 8 bolts. 1 bolt is broken. the flywheel itself has about 1.5inches of rotation slack in the hub. you can move the flywheel for 1.5 inches in either direction before turning the crankshaft. the keyway is OK and the hub doesnt move on the spindle. is the...
  2. JT!

    year and model # for '60s motor

    i was helping someone try to start an old motor that, as usual, is new to him. the serial # is C510380 40hp johnson super seahorse 2-cyl, with points ignition. can anyone point me to the model # for this motor as its illegible on the bracket, and i need to find him a starter. thanks
  3. JT!

    water coming out shift shaft, weak stream from tell

    when on earmuffs, i'm getting water coming out the shift shaft, and a weak stream from the pee hole. should there be any leakage other than the imperfect seal of the muffs?
  4. JT!

    fancy greases when rebuilding...

    do i absolutely need the various greases recommended in the shop manual for a powerhead rebuild? like: "2-4-C with Teflon" i have 2 stroke oil for metal parts, and light lithium grease spray to apply to the seals, etc. is this enough? will my motor self destruct because of this plan?
  5. JT!

    waterpump & 1st cylinder issues.

    1988 Yamaha 115 4-cyl -all cylinders 135-140 psi -all cylinders good spark it runs like this: put-put-put-sputter-put-put-put-sputter-put-put-put-sputter- if i remove the wire for plug #1 it runs at 75% but no sputter. put wire back on and it starts sputtering again. _______ waterpump...
  6. JT!

    poorly built merc block, is this normal?

    i recently bought a boat with a blown motor. it had a cracked casing, small fix right?....it needs crank bearing. well upon disassembly i found the cause of failure. millions of black beads. these beads have pitted the #1 piston so bad it looks like it boiled the metal. they are embedded in...
  7. JT!

    crankcase checkvalve function

    1987 merc 70hp i have a couple checkvalves in my crankcase, and they are missing the plastic stop valves. prolly melted away, is my guess. what is their function? to siphon fuel thru the bearings and cycle it to the other bearings? does it matter that the little nylon balls inside the...
  8. JT!

    complete oil injection system removal

    i am in the process of rebuilding an '87 merc 70hp elpto that had a top cylinder connecting rod (crankside) bearing failure. although the oil tank was full, there seemed to be trapped air in the tubes. long story short. the oil tank is not going back in, or are any other oil pump parts. can...
  9. JT!

    crank bearing part lookup

    im attempting to lookup the lower crank bearings (big end of conrod) for my 1987 merc 70elpto #A728174 oem: 31-43012A04 --ROLLER BEARING ASSEMBLY superceded from 31-816567A1 its price is in the 95$ range in canada. i absolutely need a new cage, or i'd buy the 25$ needle kit. now, when i look...
  10. JT!

    mercury manual 70hp

    i have seen many link to the www-alt mercury website with pdf service manuals. i have attempted to search for hours for mine, but cant find it. is it publicly available? canadian model #A728174 1987 mercury 70hp elpto is it same as american model #B110054?
  11. JT!

    1971 evinrude lark 50hp - steering conversion

    the engine is currently rigged with pulleys, and id like to transfer it to another boat; which has push-pull steering through the transom plate of a mercury, which doesnt run. can i get the evinrude in there and use the (better) steering system? is there a kit for this? or just a matter of...
  12. JT!

    cracked lower engine block - 1987 merc 70hp

    i just got myself a used boat for the hull; but want to keep the engine now. the engine thats on it has a cracked casing on the front intake side of crankshaft i am told this is common on these motors. the motor otherwise looks great. should i sell my functional 1971 evinrude 50 to repair...
  13. JT!

    cable removed hard to put into forward - 1998 75ELPTO

    i removed the shift cable, and with the engine running, it doesnt easily go into forward gear. it can be pulled into forward manually with 1 hand, but is 'bouncy' and needs a few tries to get it to pop into forward. taking it out of gear, its flings back right through neutral, and goes into...
  14. JT!

    tracker pro 115HP 1984 bored to 135 - what size headgasket?

    i'm helping a guy out with a head teardown to inspect a low cylinder (150-150-100-140) i want to order a headgasket ahead of time so it can be rebuilt in time for his fishing tourney. also need carb kits, are the carbs 'oversized' as well? can anyone tell me about these 115 to 135 conversions...
  15. JT!

    OMC parts near Kennebunkport /Cape Porpoise

    i am visiting family for the weekend and figure i should buy 2 carb kits while im down here in Kennebunkport / Cape Porpoise, Maine. is there a good place that would be guaranteed to keep carb kits for my old 50hp evinrude 1971 sierra part #18-7222 a phone number, or gps coordinates or...
  16. JT!

    canuck in maine needs advice.

    i'm in kennebunkport, specifically the south end of gooserocks beach. i normally freshwater fish for pike & muskie, in canada. i have use of a boat and have trolled the batson river from 1/2 mile inland to 1/4 mile out. i am trolling approx 30ft behind the boat, in the propwash, in 3 to 20ft...
  17. JT!

    new coils & plugs -> plugs failing

    i just replaced my coils with sierra replacement coils for my 1971 evinrude 50 after all sorts of trouble shooting i've found the problem to be an intermittant sparkplug. the plug is a QL77JC4 both are brandnew, 8 hours use. obviously i will buy more plugs and keep replacements handy. what...
  18. JT!

    stich & glue glass bottom boat

    i was looking at building a boat similar to the glen-l jimbo 16' plywood boat. is it possible to use thick acrylic sheets in the floor to have a see thru hull (mainly for seeing the fish as we jig and troll ...) can it be done or is it known to be catastrophic?
  19. JT!

    1971 Evinrude 50 - sudden power loss

    i have already tried replacing my coils to resolve the problem, but the problem CAME BACK. It did seem resolved with the new coils for about 2 hours. could i have killed the coil? or can a new sparkplug go bad and stop sparking? cylinder #1 plug is black & sooty cylinder #2 plug is 5% sooty...
  20. JT!

    motion sickness or heatstroke?

    i got home after 13 hours of fishing and my head is spinning hard. if i lie down its worse. no i didnt drink. at all. i have been boating since a toddler and am used to all conditions, and really enjoy rollercoasters, etc am i heat exhausted or did i somehow lose my sealegs?
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