1985 Johnson 9.9 flooding badly

[mustard73]

I have a 1985 Johnson 9.9 that is giving me some grief. I had it out on the weekend and the motor ran pretty good all day, started first pull, idled down and trolled nicely, etc. Towards the end of the day, I opened it up to WOT to cruise to a different part of the lake and when I got there I slowed down to find a place to anchor then the motor died and would not start again.

I don't have the top portion of the air silencer installed and noticed that the bottom portion was totally full of fuel. I removed it and emptied it out then the motor fired but would barely run and only if I gave it a lot of throttle (flooded I'm sure). Once it seemed to clean out a bit, I reinstalled the bottom portion of the air silencer and started the engine again but it started filling up with gas very quickly. I managed to limp it off the lake at WOT without the air silencer to catch the excess fuel but it wouldn't reach rpm and was running very rough.

I will remove the carb and inspect but I had just had it apart before the trip. I assume that the float is not sticking open since the ball gets firm.

Also, I rebuilt the fuel pump last year so I doubt the diaphragm has a hole in it.

Is there any other way this thing can overfuel so badly?

 

[nwcove]

Re: 1985 Johnson 9.9 flooding badly

if you just had the carb apart before the trip...theres where to start looking. ( why did you take it apart?) you could have a bad/leaky float, check to make sure its not full of fuel.

 

[mustard73]

Re: 1985 Johnson 9.9 flooding badly

if you just had the carb apart before the trip...theres where to start looking. ( why did you take it apart?) you could have a bad/leaky float, check to make sure its not full of fuel.

Just had it apart to make sure it was clean after sitting all winter. I replaced the old cork float with a new plastic one while I was in there because I had one laying around.

I'll take the carb apart again to make sure everything is operating properly though, as you recommended.

 

[nwcove]

Re: 1985 Johnson 9.9 flooding badly

cork float? in a 1985 motor? if you still have the old float compare the two.....not all floats are the same, and youd be a bit on the lucky side to have the right one " laying around".

 

[mustard73]

Re: 1985 Johnson 9.9 flooding badly

I pulled the carb apart tonight and everything seems to be in order.

The motor has spark.

Next thing I will check is compression.

Has anyone had this same problem before? It seems like fuel is blowing back. Reeds maybe?