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  1. K

    New SS prop

    I have an '06 2 stroke Mercury 50hp. Was running with 10 3/8 X 14 aluminum prop at 5400-5500 rpm at WOT. Consulted very reputable prop shop before switching to SS. Suggested I stay with same diameter and pitch anticipating losing 100-200 rpm at WOT. Replaced with Mercury Vengeance in same...
  2. K

    starting woes

    1977 25hp Johnson. Unsuccessfully attempted to start after sitting for winter. Noticed carb was flooding. Removed carb and noticed one of the four screws holding the 2 halves of the carb together was missing. Took carb apart and cleaned with carb cleaner. Installed carb and now I'm not getting...
  3. K

    '77 & '79 Lower Units

    Can 1977 and 1979 25hp Johnson lower units be interchanged? They look awful similar to me, but many parts say "1978 and newer", seeming to indicate that there may be something that changed in 1978. I'm needing to replace the foot, not the entire lower unit housing. The model I have is 25R77S...
  4. K

    25hp lower unit leak

    Was getting water in gear lube. Pressure tested and found 2 pinholes in lower unit just above upper half of gear case below "cav" plate. Any suggestions on repairing these pinholes? Thanks.<br /><br />Jim
  5. K

    1977 25hp Johnny won't start

    Model 25R77S. Ran fine before hurricane Rita and has not been started since (approx. 5 weeks). Went to add fuel stabilizer for the winter and it wouldn't start. External fuel pathway is fine. Bottom half of fuel pump wet, upper half dry. Fuel obviously not getting to carb. Sprayed fuel...
  6. K

    Do we have a match???

    Think I may have finally found a match for the old 25hp Johnny... Okay, OMC part # 389068. (9X9) Anybody know what this originally came on? And anybody know if it will go on 1977 model 25R77S?
  7. K

    help w/prop 1977 25hp Johnson

    Can anyone tell me if any of these will fit? 1977 25hp Johnson 25R77S. My prop shaft is splined and has prop nut with cotter pin. Thanks. 9X10 or A - 85265 or 9X10 #2
  8. K

    prop hub

    1977 25hp johnson 25R77S. Got my hands on a prop that I can use as a spare. Same prop I have on the motor now, but hub is different (smooth vs splined). Can I change this hub, and if so how is this done? :confused: Many thanks. Pic for reference.<br />
  9. K

    Water & exhaust ? in gear case !!!!

    1977 25hp Johnson 25R77S<br />I've got water and what looks to be possibly exhaust in the gear case. Changed clutch dog and noticed water in the gear case after taking it out on the water, so I re-sealed the case and added new gear lube. Put it on the water again and then drained gear case to...
  10. K

    25hp head gasket

    1977 25hp Johnson electric start model 25R77S. <br />Okay fellas, I'm fixing to tackle my first head gasket change. Will replace thermostat, water deflectors, bypass,exhaust and water cover gaskets while I'm in there. Have my Seloc and OEM manuals and have parts ordered. I just wanted to see if...
  11. K

    '77 25hp Johnson Manual

    Have a 1977 25hp Johnson and have access to 1979 OEM service manual. (Already have a Seloc) Are the motors basically the same?? <br /><br />Jim
  12. K

    25 Johnson Waterflow Trouble

    1977 25hp Johnson Model 25R77S<br />Water output gradually decreases as throttle is increased. At approx. 1/2 throttle, all water flow stops until I let off the throttle. I thought this was caused by water pump, so I changed it. No improvement. Motor is running fine. Appreciate any...
  13. K

    clutch dog part #

    Can anyone provide the part # for the clutch dog for 1979 25hp electric start evinrude? Thanks.<br /><br />Jim
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