about ready to give this thing away...

[charlie1975]

seems like one problem after another...1975 mercury 85 horse.not been started in over 2 yrs.changed plugs in it today just for the hell of it..tried for several mins.to get it started and it acted like it wanted to but not...so i pulled up the manual choke and not long after it fired up...now the prob. is my top carb is leaking gas.dont remember if i noticed before or after i pulled choke or if it even matters.whats up with the carb leaking fuel... thanks any help at all would be greatly appreciated charlie1975

 

[rowdyboy321]

Re: about ready to give this thing away...

look like its time for a rebuild now and fish later,or if you not to far away i'll take it.

 

[stormmn]

Re: about ready to give this thing away...

this style of carb. is noted for "leaking" a little fuel when choked. If you look at the bottom of the upper housing under the carb. inlets, you will see that Merc. designed a catch basin with a hose to drain the excessive fuel... Now, with that said, a carb. rebuild is not a major job, check and see if they are still leaking while the engine is running. My bet is they are not, if they still are order two kits with floats and go for it.

 

[Chris1956]

Re: about ready to give this thing away...

Stormmn, That carb was not designed nor noted for leaking fuel. The basin is to catch fuel when the motor is tilted up.

Charlie, You do need to rebuild the carbs. Remove them, take them apart and soak them in a carb cleaner solution. Blow out all passages with compressed air and install new gaskets, inlet needle and seat, and new floats.

A service manual will assist you greatly in this repair. You might take a compression test and spark test to see if the carbs are the only issue.

 

[merc850]

Re: about ready to give this thing away...

There are fuel filters on one model of carb,if you have this type of carb undo the fuel line and check for blockage. My lower one was blocked so I removed the screen. There is a screen at the fuel pump anyway.

 

[charlie1975]

Re: about ready to give this thing away...

thanks guys will check these out and get back with you all...thanks again charlie1975

 

[daveswaves]

Re: about ready to give this thing away...

Stormmn, That carb was not designed nor noted for leaking fuel. The basin is to catch fuel when the motor is tilted up.

Charlie, You do need to rebuild the carbs. Remove them, take them apart and soak them in a carb cleaner solution. Blow out all passages with compressed air and install new gaskets, inlet needle and seat, and new floats.

A service manual will assist you greatly in this repair. You might take a compression test and spark test to see if the carbs are the only issue.

I am certainly with Chris on this one, especially the new floats and carb overhaul. Floats must float.:facepalm: Been there, found that.