Recent content by chopper_man

  1. C

    Spark Plugs

    What are the best plugs for a 1975 Johnson 70 HP???
  2. C

    Tach ???

    Hello everyone<br />I have done a search for answers to my tach question but found no answer.Here goes i have a 1978 bayliner mutiny with original gauges still in dash.I recently removed a dead 115 hp merc engine and put on a 1975 70hp(70ESL-75) johnson.Now i have located the gray wire in my...
  3. C

    Average speed ???

    Hi<br /><br />I recently mounted a 1975 70HP Johnson on a 17'1978 Bayliner Mutiny.I'm currently reaching speeds around 30 Mph WOT with 2 people and all gear does this seem about the average speed??? While pulling a skier etc.it drops down to about 25 Mph.Just curious to know if this a good...
  4. C

    1975 70 hp Johnson

    Hi,i have rebuilt the carbs,replaced all 3 coil assemblies,new plugs.There is good compression in all three cylinders and they all fire.After all this work it ran great for a few weeks and now when i punch the throttle to wot position it won't punch out of the hole,seems like half throttle now.I...
  5. C

    Boat size to motor size???

    HI<br />I have a 17' Bayliner Mutiny that i have had for awhile now the original motor was a 1978 merc. 140 hp.,which is totally shot now.My question is i have a 70 hp Johnson which came off a 14' old traveller runabout will it be sufficient to push this big beast???<br />I think it would do ok...
  6. C

    75 Johnson 70hp dead cylinder

    Hi,i have a strange problem going on here,my top and middle cylinders are firing and the bottom intermittently fires when it wants too what causes this????I have replaced all 3 plugs and properly gapped,replaced all 3 coils.Sometimes i will be cruising along at at half throttle then when i punch...
See more
Top