Recent content by mamm7215

  1. M

    '88 johnson 15hp overheat mystery...

    Ok, mystery to me. Water was coming poorly out the telltale and I could idle and run slow but any kind of speed it would overheat and blow steam. Impeller I thought, no biggie. I changed the impeller and housing and grommet seal (all came in kit). I also replaced the head gasket and...
  2. M

    Tach reading 1000rpm too high?

    Boat starts and runs fine, electrical all seems good, battery charges to 14-15v at speed so I'm thinking bad tach? It's original on the boat so it wouldn't surprise me...Just putting this out there...
  3. M

    Reed Question

    I'm going to do the thermostats on my '81 90hp and I'm thinking of taking off the power head to do it. While it's off I'm going to check the reeds, I suspect a possible bad one due to cylinder 1 running a bit lean with clean carbs (really clean). It's been overheated by a previous owner but...
  4. M

    Frustrating overheat issue...(bit of a long post)

    This is a bit of hold-over from last season but I got an '81 90hp for my boat after the 140 it came with blew up (broke rings). I had great plans to rebuild but after tearing it down, the crankcase needs to be sleeved and the crankshaft is scored so it's not worth it. The 90 ran but had been...
  5. M

    How bad is this crankshaft...

    So I've got my 140 torn down and am trying to assess how bad it was. Bought the boat a year ago knowing nothing so you know how this is going to go... Anyways had it out for a couple of days then cylinder 3 breaks a ring. Got a replacement 90hp (same year-'81) and spent most of the rest of...
  6. M

    '88 15hp won't start...

    I bought this last season and the PO had just had it serviced and it ran fine. I noticed at the end of last season it was harder to start but eventually would and run ok after I got it going. I also noticed the fuel pump was cracked around the inlet hose attachments so I got a new pump and put...
  7. M

    Quick rebuild question

    I'm about to rebuild my '81 140, my oem manual states that if I remove the rod caps to put new rod bearings in, to discard the rod cap screws. Are they not reusable? Do I have to get new ones? Just curious. Thanks
  8. M

    Carbuerator swap compatibility

    I'm rebuilding my '81 140hp that blew the rings in cyl.3 It's got the 5/16 throat carbs with the two jet cap screws on each side of the lower bowl. I'm having a hard time finding these exact ones (the top carb is physically damaged with hairline cracks). Would carbs from any early-mid '80s...
  9. M

    Lean #1 cylinder

    No matter what I've tried, I still have a lean #1 cylinder on my '81 90hp Johnson. The carbs are fine, cleaned them at least 2-3 times after new kits, pulled jets, cleaned them as well, adjusted floats, I have a factory manual. The only thing I haven't done is pull the recirc hoses. I also...
  10. M

    Any place to buy new carbs?

    Just wondering, I've rebuilt my carbs on my 90hp but the linkages and throttle shaft seem pretty loose so I was wondering if it's possible to buy new or nos carbs for these motors: 90hp '81 Johnson J90TLCIM Thanks.
  11. M

    Carb Issue? What did I miss...?

    Hi all, just finished a test run after I got my factory manual and did the link 'n sync setup. 90hp '81 Johnson Crossflow. Carbs cleaned and gone through twice. Compression is good, spark is good. Idles fine in water and in gear. My issue is when I start to accelerate through mid-throttle...
  12. M

    Driveshaft seal housing stuck...

    Maybe frozen is a better term. Anyways, I have m lower unit seal kit for my '90hp Johnson as while I was doing my impeller, I thought I'd do the driveshaft seals as well, getting milky gearcase oil. I replaced the shift rod seal but when I took the 4 bolts off of the driveshaft seal housing...
  13. M

    Just got my OMC manual, now a question about sync...UPDATE

    So I'm all ready to tear into a proper link 'n sync but I have a question about the cam alignment. I've read here and in my Clymer and Seloc manuals to adjust the cam follower to the upper cam mark but my OMC manual for my '81 J90tlcim says "Manually advance cam against cam follower roller...
  14. M

    The fix thread...

    Or maybe the mods can create a sticky... I'm referencing this post: http://forums.iboats.com/showthread.php?t=427019 where the poster actually replied with his solution. There's so many posts here where so much great advice is given but there's never a posted solution. There's a few, but I...
  15. M

    WOT timing question

    I went to do the WOT timing as per the top secret file by TD. Problem is I can't turn my motor over with the throttle at full because of the neutral safety switch in the control box. Is there an easy disable or do I disconnect the throttle cable from the motor and just put the lever forward to...
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