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  1. C

    150 efi water pressure issue

    I just replaced the impeller in my 97 150 efi. I launched it and have 3 psi at idle (normal) when I rev the motor it shoots up to 8 psi and stops. I thought it might be a bad gauge, so I brought it home and tested the gauge and it reads correctly. Normally when I replace the impeller I have 20+...
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    25 Johnson leaking LU oil thru vent

    I have a 98 Johnson 25hp is leaking lower unit oil out of a small hole above the cavitation plate on the opposite side of the LU from the drain plug.I was given this engine and don't know any maintenance history. Is it possible that the oil had been changed and overfilled. I ran the motor 20+...
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    25 hp / 35 hp differences

    What are the differences between a 25 and 35 horse Johnson(mid 80s) other than carburation? I own one of each but the 25 is in superior condition and was wondering if the block porting or possibly the exhaust tuner was different. It would be sweet and easy to simply swap carbs to make the 25...
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    150 efi no spark on 1 cyl

    I have a 97 150 efi. #6 has no spark. I have eliminated the coil by swapping the hotwire from #4 to #6. So as I stand now,:% I know I have a good plug (new) good coil wire and a good coil. Where do I look next?
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    20 merc been in storage-no fire

    I've got a 78 model 20hp merc that's been in storage the past 6 years. Running great when stored. Put it on the stand today and no fire whatsoever. Any ideas? What do I check and how? Any help would be much appreciated...Cmack :confused:
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