hi guys

[jon1985]

I have 120hp johnson, I took it for fishing last week, I drive it slowly no problem but when I put the speed up won't go, plz help

 

[gm280]

Re: hi guys

I have 120hp johnson, I took it for fishing last week, I drive it slowly no problem but when I put the speed up won't go, plz help

If this boat/engine use to work perfectly, it sounds like a carb or carbs rebuilt time... Yes there could be other issues as well. but I'd look at the carb(s) first. But that is just my opinion...

 

[racerone]

Re: hi guys

More history required.------Ran OK the last time you used it ?----New to you motor ?---Compression test done ?------Checked for spark on all 4 cylinders ?

 

[boobie]

Re: hi guys

Do a cylinder drop test on it to make sure it's running on all 4 cylinders.

 

[oldboat1]

Re: hi guys

More history required.------Ran OK the last time you used it ?----New to you motor ?---Compression test done ?------Checked for spark on all 4 cylinders ?

hmmm. "ran well the last time it was used...." See some advertised like that, but that's probably a little different!

jon1985 -- should provide a year and model number, and whatever addit. info. you can provide (above).

See you had an earlier post on an '86 model. This the same motor?

 

[jon1985]

Re: hi guys

The motor start easy every time, im thinking maybe the propeller because run ok on low speed but when I go faster I feel like the motor want to fly but it keep running in place

 

[F_R]

Re: hi guys

See what a little information can do? It ain't the carburetor, it IS the propeller. The rubber shock hub in it is slipping. Replace the propeller or have it re-hubbed.