NEED HELP WITH CARBURETOR IN UPSTATE NY AREA

[chromedog]

I have a 650 mercury, I think it is a 1975 and I need to have the carburetor cleaned and or rebuilt (lack of power issues).  Can anyone help?  I am in the upstate NY area and was hoping someone knew someone or something that would help me out before we get to far into the season.

[fishfordollars]

I have a 650 mercury, I think it is a 1975 and I need to have the carburetor cleaned and or rebuilt (lack of power issues). Can anyone help? I am in the upstate NY area and was hoping someone knew someone or something that would help me out before we get to far into the season.

If you're asking if we can walk you through a rebuild here on this site. No, and don't attempt it unless you are mechanically inclined.

If you are and want to give it a try make sure you take pictures and mark everything before you start the tear down. Way too involved to try to walk you through it. Unless you are familiar with needle and seats, float adjustments, and idle adjustments you will have it in a hell of a mess. You certainly don't want to lean it out and burn a piston either. Carry it to someone that knows what they are doing and be done with it.

There are actually very few parts in the carbs, it's the adjustments that will give you fits.

Good luck,

Jack

[chromedog]

Ya, I am more so looking for someone to rebuild it probably.  I am pretty inclined, just never dealt with motors much.  I am going to remove the carburetor and try cleaning it and go from there.

[Marty]

I am in the upstate NY area

May I suggest you narrow that down somewhat. By some definitions, "Upstate NY" can be the whole state other than NYC and Westchester County.

[chromedog]

I am in Cortland.  But I decided to just take it off myself.  Sat down and drew it up to remember where everything went and then removed the carburetor.  Maybe someone can help me with this:

Problem:

Motor starts and runs fine at idle and lower speed.  Once you put the throttle down, it doesn't increase speed and does not trim out.  Obvious lack of power.

Took carburetor apart.  Little bit of crap in the bottom carburetor bowl, very little, everything  looks in pretty good shape. 

Remove top carburetor and take the top off the the bowl.....no gasket!  (Side bowl carburetor btw.)

If what I read is correct, that bowl should be vacuum sealed in order to operate correctly.  Would the lack of gasket be the lack of power issue I am experiencing?  If it is not operating correctly, would some gas get into the carburetor (enough to open the drain screw and some gas come out) but not have pressure, thus not actually supplying the power needed?  Would that be why I see a little bit of gas in the water when the boat is in water?

[junebugmn]

Here's some advice! If you are doing this yourself, which it look's like, go to your local mercury dealer give him your id number from your motor and ask him if he could microfisch the carb, blow up and print you a copy 8-) your problem sound's like it's in the high speed circuit but check your filter's, primer bulb, fuel line's etc also! Good luck Junebugman