Let me start by saying that I am new to the site, and boat ownership. I don't know very much about out boards. I just purchased a 85 Ranger with a 86 Johnson 150. When i went to look at the boat the owner put the muffs on and fired it up. The motor started, but was doing this irregular sorta surging thing. He pumped the bulb and it cleared it up for a short while, then it started doing it again, I also checked the comp. on all cylinders (95-100). I bought the boat anyway.
It was a week before i could put the boat in the water and try it out. When i put the boat in at the marina it started but was doing that surge thing. I idled to the outside of the no wake zone and gave it some throttle. The motor just kinda fell on its face and would not pick up any speed. I made several attempts. One time the boa almost came up on plane but the bogged down. The motor also died several times during the test trials. Finally i said screw it I will take it to a mechanic when i get home.
In the mean time i decided since i'm on the water and it's a nice day i think i will just fish for a little while before i put her back on the trailer. After fishing for about an hour i fired her up again. The motor seemed to running smoother, so I idled out to the no wake zone and pushed on the throttle. She took off WOT 65 mph. I ran her for about 20 min. and put her on the trailer.
Two days later: I put her back in at the same place. started her up, running ruff again. went to give throttle nothing, just as before, tried for several minutes to get going, finally she takes off. I ran her for awhile then fished awhile, changed locations several times and she ran fine. I was heading back to the ramp, idling through no wake zone, and she started running ruff again.
I am thinking carbs, but really have no clue. any suggestions?
It was a week before i could put the boat in the water and try it out. When i put the boat in at the marina it started but was doing that surge thing. I idled to the outside of the no wake zone and gave it some throttle. The motor just kinda fell on its face and would not pick up any speed. I made several attempts. One time the boa almost came up on plane but the bogged down. The motor also died several times during the test trials. Finally i said screw it I will take it to a mechanic when i get home.
In the mean time i decided since i'm on the water and it's a nice day i think i will just fish for a little while before i put her back on the trailer. After fishing for about an hour i fired her up again. The motor seemed to running smoother, so I idled out to the no wake zone and pushed on the throttle. She took off WOT 65 mph. I ran her for about 20 min. and put her on the trailer.
Two days later: I put her back in at the same place. started her up, running ruff again. went to give throttle nothing, just as before, tried for several minutes to get going, finally she takes off. I ran her for awhile then fished awhile, changed locations several times and she ran fine. I was heading back to the ramp, idling through no wake zone, and she started running ruff again.
I am thinking carbs, but really have no clue. any suggestions?