Recent content by gdc0581

  1. G

    74 johnson water pump removal problem

    I'm trying to replace the impeller on this motor and I've run into a sticky problem. Somewhere during the last 40 years, someone used a non-OEM screw in one of the water pump housing attachment points. When I tried to remove it, the head broke off. Since I do a lot of work on older outboards...
  2. G

    99 Mercruiser 5.oL coolant change'

    I'm trying to do a coolant change on my 1999 (I think, SN OL258272) Mercruiser.I've had the boat since it was new and I missed the part in the maintenance schedule about changing it every two years, so I want to do a good job. My Service manual, which covers 1996 and 1997 models says there are...
  3. G

    96 Johnson 15 starter lockout problem

    I'm reconditioning this motor for resale. I have a ton of experience on the older design motors, but this is my first at this 'new' design. (actually, I've searched my memory banks and this is the newest outboard I've ever worked on). The problem I'm having is that the wire link between the...
  4. G

    1999 Mercruiser 5.0L oil safety switch

    My 1999 5.0 L is doing the start - run 5 seconds- die thing. When it runs, it runs beautifully and has good oil pressure showing on the gauge. I have disconnected the fuel line at the carburetor and find I get good fuel flow while cranking, but none while running. From other threads, I suspect...
  5. G

    72 Merc 7.5 no spark

    I have been given a 1972 7.5 horse merc. It looks to be in pretty good condition, but has no spark. I've done a lot of work on Johnson/Evinrude motors, but this is my first experience with a Merc. I've purchased a Seloc manual that covers this motor, but I'm a little disappointed with the...
  6. G

    1980 Johnson 35 HP-compression

    I just did a complete powerhead rebuild on my 1980 Johnson 35 HP. I had it bored .030 oversize and replaced pistons and rings. I've put it together and have run it at idle on the work stand for about 20 minutes. I've checked the compression and I'm getting 110 in one cylinder and 120 in the...
  7. G

    1980 Johnson 35 - tach

    I want to install an OMC outboard tachometer on my 1980 Johnson 35 HP. After reading about 50 tachometer threads, I think I want to attach either one of the yellow leads from the stator to the pulse input of the tach. I'd appreciate confirmation on this. Also, what is the correct setting for...
  8. G

    1980 Johnson 35 leftover part

    I just converted a SS 1980 35HP to long shaft. Since I virtually had to disassemble the entire engine to do this, I decided to paint it. It's all back together now and it looks and runs great. The problem is that I have one part left over. The part is 323107 and it is item 78 in the parts...
  9. G

    1980 Johnson 35 HP power head removal

    I'm trying to remove the power head of an 80 Johnson 35 HP. I've removed 4 bolts and the nuts off of two studs. So far, gentle persuasion has not broken anything loose. Looking from below, it looks like any kind of wedge will be lifting the lower cowl off of the exhaust housing or should I say...
  10. G

    1982 25HP impeller replacement

    I've owned and worked on Johnson/Evinrudes all my life. A friend has asked me to replace the impeller on his 1982 25Hp Merc. I've removed the four bolts that hold the gearcase to the exhaust housing, but can't figure out how to disconnect the shift linkage. I can see where the shift linkage...
  11. G

    78 johnson 15HP-lead shot in carburator??

    I am re-building the subject motor. It has good even compression of 120 PSI in both cylinders and good spark. I've put in a carb kit, new water pump, and thermostat. The problem I'm having is strange behavior at idle. With the engine warm, it idles OK at first, but slows down and stops over...
  12. G

    79 Johnson 15 powerhead removal

    I'm trying to remove the powerhead from a 79 Johnson 15 HP. I've removed the 6 bolts that connect the powerhead to the outer exhaust housing and the 3 bolts that mount the lower motor cover to the powerhead. The powerhead doesn't want to budge. It may be just gasket sealer that is holding it...
  13. G

    Gasket sealer on reed plate?

    I'm rebuilding the power head on my 1977 75HP Evinrude. I'm a little confused as to whether I should use gasket sealer on the gaskets on either side of the reed plate. The factory service manual says to use OMC gasket sealer on all gaskets except those that are specifically labled not to use...
  14. G

    70 HP Evinrude exhaust manifold removal

    I have a 1978 70 HP that I bought as a parts motor. I've removed the PH and completely disassembled it except for the exhaust manifold/water jacket. The head broke off of the first bolt I tried to remove. This is a salt water motor and it looks like the prior owner had never heard of flushing...
  15. G

    Johnson 9.9 weak spark

    I have a 1989 Johnson 9.9 electric start. I was out on the water a couple of weeks ago and it was running fine and it just died. It hasn't run since. It looks to me like the spark is weak. If I pull the plugs and ground them, I do get some spark that appears to be blue. If I put a 1/4 inch bolt...
See more
Top