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  1. S

    Starting issue 1983 90hp V4

    So, need a little help. Motor runs great. But I have found out that after running for a little bit (20 plus minutes) and sitting for a bit. The motor is hard to start. Primed the engine etc. pushing key in and still hard to start. I have found out that if I trim up the motor it starts great...
  2. S

    Tachometer inop after 70hp 3 cylinder to 90hp V4

    Ok, swap complete. Motor runs great. 90hp V4 really woke up my little 16ft boat. But would like to get the tach working again. Old motor was a 1983 Johnson 70hp 3 cylinder. New motor is a '87 Johnson 90hp V4. Tach worked great with the 70. But not with the 90, Is there something that needs to...
  3. S

    90 hp V4 Lower Unit Full of Water internally (not in gear case oil)

    Well, I finally got going after the water pump on my 90hp. Remove the lower unit. Came apart really nice, piece of cake. I found that the unit has water pretty much every where. Watching videos etc on youtube. Most of the ones I see are fairly clean. The gear case oil has no water (zero) So...
  4. S

    Shortened Pee hose?

    Ok been doing some digging into the v4 90hp Johnson I plan on swapping onto my 16ft SPL Sunbird. Has good compression (115 in all cylinder) Has good spark. So looking good so far. My question is this. The previous owner has shorted the pee hose dramatically. It is maybe 4" now and goes right...
  5. S

    What size fuel line?

    I am in need of a new fuel line front tank to motor. In doing my research. I have found 5/16" and 3/8" Which one?
  6. S

    1983 johnson 70hp to 1987 90hp v4 swap question

    So, purchased a 1987 90hp V4. I am going to swap this onto my 16" boat. My question is this. My boat currently has a 1983 70hp 3 cylinder on it. Is the 90 going to be a plug and play unit? So, unplug the 70hp red connector from my controls and plug them into the 90? Or is there some wiring that...
  7. S

    90hp V4 leaking from small holes?

    Ok, so I found a 1987 Johnson 90hp V4 (700 dollars) to replace my 1983 70hp Johnson. Did the compression test and spark test. Passed with flying colors. When I checked the tilt and trim (worked great). I noticed water leaking from the 2 very small holes at the very front of the lower unit...
  8. S

    1987 90hp V4 wiring schematic

    Ok. I just picked up a 1987 90hp V4 motor for dirt cheap. The compression is good on all cylinders (115psi) But there are some wires that look questionable. So, I plan on repairing the wires prior to removing my 1984 70hp motor. Does anyone have a wiring schematic for this motor please...
  9. S

    Making my own hook for lifting

    Just what the title says. What nut size and pitch for making my own lifting hook off flywheel. 1987 90hp V4 Thank you
  10. S

    70hp Johnson replacement recommendations on 16' boat needed

    Hello to all. I am new to this site. I have a 1990 Sunbird 160 (16ft) boat with a 70hp Johnson outboard. I would like to replace the engine with something a little more powerful. So, My question is what motor would be the best? I am researching the weight of the 90 and 100hp Johnsons. Kind of...
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