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  1. R

    1979 Johnson 70 HP 70EL79R

    There is no difference.----Except for any minor changes ( paint color ) that occurred mid production run.-----------Install a new water pump impeller and test the overheat horn before launching the boat.
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    Flywheel is easy to spin without spark plugs

    No such thing as " too much compression" on these.-----Charge the battery.-----Have the battery load tested.----Take starter apart for inspection of brushes.-----Do an ohm test on armature.-----No money spent to do this inspection !!!
  3. R

    80hp evinrude sticky throttle

    Good job.
  4. R

    1970 4hp Johnson low compression

    Beginning in 1964 or so they all ran on 50:1 -------That may not be the best for those smaller motors 1.5 / 2 / 3 and 4 HP models that did not have needle bearings on the big end of the rods.------I have had many of the 6 HP models apart.-----Never an oiling issue on the bronze main bearings for...
  5. R

    Gearcase compatibility - V4 Crossflow question

    The driveshaft spline count has been the same on V-4 and V-6 ( also those V-8 1986 to end ) motors from 1973 to year 2005 or so.-----But the length of that spline and seal arrangement on end of crankshaft changed.-----So if you back off all the bolts 2 turns does flywheel turn easier ????
  6. R

    mercury 2.5 lower unit shimming

    Well-----A 2.5 HP or a 2.5 liter ?-----Serial # of this motor ?
  7. R

    1969 mercury 800 (80hp) 4cyl Lower Unit Removal

    There may be a bolt / nut hidden by the trim tab.
  8. R

    Need electric start on my 30hp johnson

    It should work.----Might have to change out the pinion on the starter.
  9. R

    Alarm horn @ 4600 rpm

    Is it a solid alarm ?----Have you replaced the water pump impeller ?----Running with VRO in service and tested ?----Yes , it could also be the fuel restriction alarm.-----Try bypassing or taking the 10 micron filter out as a test.
  10. R

    very cool carb and intake manifold causing moisture

    Carburetors cool down when running.----Liquid fuel needs heat to vaporize !!
  11. R

    very cool carb and intake manifold causing moisture

    An evaporating liquid needs HEAT.-----Therefor the manifold cools down.-----There is no cooling water near the intake manifold !!
  12. R

    Fuel Pump Bad?

    Fuel pump is working very well if it pulls the bulb flat.------You have a blockage from bulb to the bottom of the tank I think.
  13. R

    Towing a boat with 9ft beam...

    Likely easier to plead forgiveness that get permits for more than 1 state.-----Check the regulations in your state.
  14. R

    1970 4hp Johnson low compression

    Pull the head for inspection.-----Head is warped ( they all are ) , so refinish it on a piece of glass with emery paper before installing the new head gasket.
  15. R

    1989 70, lower unit bolts

    You need 6 bolts and one more for the trim tab.-----They are a 3/8-NC thread and stainless for 4 of them.----One is a 5/16-NC thread.------One is a 7/16-NC thread.-----Measure the gearcase and add proper length for thread engagement.
  16. R

    Mercury hard shift problem

    More than 12 years ago but the following applies.----If you are testing on land the motor must be running or if stopped the propeller must be turned for reverse shifting.
  17. R

    Sneezing with video

    Revisit carburetor work.----Check to make sure nozzle gasket is in place.----Make sure low speed needle is actually moving in and out.----Make sure low speed circuit is clean.----Any powerhead gaskets ( exhaust cover ) leaking ? -----Should be a simple fix I think.
  18. R

    Oil mix ratio

    Use 24:1 on that motor.------I often say it ---" oil and lubrication in 2 strokes is not well understood "------Or perhaps post here in what you know about bearings and what happens to the oil that is mixed with the gasoline.
  19. R

    Johnson bearing housing seal assembly.

    If you heat the bearing housing the bearings might fall out.-----Or be easy to push out with say a socket.
  20. R

    Oil mix ratio

    Mix at 24:1-----But you will get many different opinions on oil and lubrication.----No needle bearings so they need oil for cooling.----Need oil to set up the " hydrodynamic wedge " in these bearings.
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