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View Full Version : 1965 Mercury Model 60 6hp Carb Float Setting - Serial Number: 1793503



JeffinColorado
03-29-2019, 08:58 PM
I finished the ignition and have now moved on to the fuel system. Found it fully clogged. I disassembled everything and ran the parts through an ultrasonic cleaner.

I put it all back together and had fuel leaking out of the little tube that sticks up and outward, just behind the choke plate. Since I'm unable to locate any information on setting the float I'm hoping to get any information I can from this forum.

mechanicman
03-29-2019, 10:06 PM
First you should test the floats. Are they plastic or cork? If they are cork. They could be saturated and may not float well. If they are plastic they may cracked and also won't float well. You can test them in clean gasoline in a clear jar or dish they will be heavy on the float tang side. But should float about half the floats height . Shake them if they are plastic. Listen for liquid inside.
So mostly for adjustment. Hold the carb upside down with the float and needle installed. And the float bowl off. The float should be level with the bottom of the carb. Looking sideways at the carb. Choose a straight line on the float. And make it level with straight edge on carb.

racerone
03-29-2019, 10:38 PM
mechanicman-----Have you ever worked on one of these carburetors ?

JeffinColorado
03-29-2019, 11:31 PM
The float is plastic and floats pretty good. The procedure you described is fine for most other float adjustments. However, this designed is a bit different. The float sets in a tube "bowl" and is not physically connected to the needle. As the bowls fills, there is a spring on the top of the float that contacts the bottom lever. There are 2 levers that push up on the base of the needle. Only the bottom lever gets adjusted by bending a tang. So I'm trying to determine how much to bend the tang. Worse case will be to adjust it for the lowest possible position

racerone
03-29-2019, 11:45 PM
Jeff-----find ----mastertechmarine----or ----maxrules.--------Keep clicking till you find the measuring of the 2 levers.-----Might as well take the time to do it the right way !!!

mechanicman
03-30-2019, 12:00 PM
I've worked on many carbs. Usually a picture helps me determine what I'm talking about. I'm old and can't remember what every carb looks like. But there all basically the same. It's obvious now that I did not give the right procedure. And I do apologize.

JeffinColorado
03-30-2019, 09:35 PM
1986219863

racerone
03-30-2019, 09:57 PM
I know what the carburetor looks like.-----Have a few on motors and in boxes on the shelf.----Did you find the info for adjusting the levers ?

JeffinColorado
03-30-2019, 10:23 PM
Not yet, still looking.

mechanicman
04-01-2019, 06:14 PM
Ok I think I found what you need. Send me your email in a private message . I will send you some pictures of the procedure.

theswede
05-26-2019, 02:14 PM
please send me som picture to.
i have same carburetor and same motor, maybe little bit younger, 1968?20429

Quicksilver
05-26-2019, 03:50 PM
For everyone who has those style carbs:20430and they're very common.

theswede
05-26-2019, 04:08 PM
please send me som picture to.
i have same carburetor and same motor, maybe little bit younger, 1968?20429

check out my pdf,can someone answer if screw shall be fixed in bottom or shall it be adjustable?

racerone
05-26-2019, 04:51 PM
That screw with the long tube on it is put in tight. -----It is not an adjustment.

theswede
05-26-2019, 05:08 PM
so there is only one screw(idle) to adjust?20435
20436

racerone
05-26-2019, 05:21 PM
The high speed jet is fixed.----Low speed mixture is adjustable.

theswede
05-30-2019, 10:39 AM
https://www.youtube.com/watch?v=JMkP4Fg-dsk
after i replaced a gasket to idle tube and adjust idle my old lady works like a charm
im so happy!