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  1. Z

    Mercury 115 4 stroke intermittent low rpms at full throttle

    I have a 2009 sweetwater 24' pontoon with a 2009 mercury 115 4 stroke efi. We just recently purchased the boat used. When we first start off I can give it full throttle and the engine will only give me about 3000 rpm and I'm moving about 6 to 10 mph. If I pull back on the throttle to about half...
  2. Z

    NS40C Low Compression

    The top cylinder has 30lbs of compression and the bottom one has 120 lbs. What would cause this other than burnt piston or ring failure. What I need to look for when I open it up. How hard is it to change a piston and rings if the bore is fine?
  3. Z

    Ns40c no power

    I posted the other day about the engine shuting off on the water. i took it home and flushed the fuel system and adjusted the carb some more. I let the engine run for about 30 min and it would rev up great. the engine was sounding good. So i took it out on the water. started up fine, went to...
  4. Z

    NS40C Died on the water and would not start again.

    So i just did a carb rebuild and also replaced the water pump. i took it out today and she fired right up ran great. rode out about 5 min to a sand bar. waited about an hour. started the engine back up, for some reason the motor did not want to go into reverse. so we rode around for about 10...
  5. Z

    Need help!!! Oil leaking from gearcase.

    I changed the water pump impeller out today. Once i put the gearcase back together. I tried to fill the foot up with new oil. I put it in from the bottom hole, but about half way into this the oil started leaking from a whole in the gearcase about halfway between the bottom and top oil fill...
  6. Z

    89 nissian ns40c running problems

    I have a 89 NS40C I cant get to stay running. I need a carb rebuild kit but I cant find one. and what are the setting for the carb. It seems like its getting to much fuel. I dont know much about them. So any help would be great.
  7. Z

    Problem starting 89 Nissan NS40C

    So I just got this small grumman boat with a 40hp Nissan NS40C outboard. The guy told me the motor was no good. So I checked it and it had compression, So i went to the basic and put fresh gas, sprayed carb cleaner in the carb, cleaned the spark plugs. I had no luck, But Then I started messing...
  8. Z

    Does a 89 nissan NS40C charge my battery while runing.

    If not what is a good way to charge the battery while on the water? Maybe Solar panel?
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