'79 20hp Mercury Start but won't Run

[billybass]

I have a 1979 , 20hp Merc that been setting up for two years. I just recently put a new water pump and cleaned and put new gaskets in the carb. The motor will start momentarily, but will not keep running, I did not put a new fuel pump in the carb. while I had it apart. Can anyone give me some advice on what I should do to fix this problem? Thanks in advance.

 

[Plainsman]

Re: '79 20hp Mercury Start but won't Run

If you pump the bulb will it stay running?

And Welcome to iboats!

 

[deejaycee_2000]

Re: '79 20hp Mercury Start but won't Run

did you clean the carbs properly?

 

[timmathis]

Re: '79 20hp Mercury Start but won't Run

Do you have a manual for this motor?

 

[billybass]

Re: '79 20hp Mercury Start but won't Run

If you pump the bulb will it stay running?

And Welcome to iboats!

No, Eric, I tried pumping the bulb, while it was running and it still would not keep running.

 

[billybass]

Re: '79 20hp Mercury Start but won't Run

Do you have a manual for this motor?

No, Tim, I do not have a manual.

 

[billybass]

Re: '79 20hp Mercury Start but won't Run

did you clean the carbs properly?

You might have found the answer to my problem, I probably did not clean the carb as well as I should have, I kinda thought that might be it and after your questioning it, I think I should take the carb off and do a more thorough job. Are there any particular spot that I should give more attention to than others?

 

[deejaycee_2000]

Re: '79 20hp Mercury Start but won't Run

yes, there is .... take it apart and soak in carb cleaner for at least over night, then blow out all the jets etc. and all the little holes and things with compressed air ... put together correctly and that should do it .... good luck ...

 

[billybass]

Re: '79 20hp Mercury Start but won't Run

yes, there is .... take it apart and soak in carb cleaner for at least over night, then blow out all the jets etc. and all the little holes and things with compressed air ... put together correctly and that should do it .... good luck ...

 

[billybass]

Re: '79 20hp Mercury Start but won't Run

yes, there is .... take it apart and soak in carb cleaner for at least over night, then blow out all the jets etc. and all the little holes and things with compressed air ... put together correctly and that should do it .... good luck ...

Thank you, I appreciate your help.