KSMmerc
New member
I've worked on carbs before and understand the purpose of the different circuits of a carb on throttle opening (starter circuit or choke, idle jet, main jet and nozzle, and idle air screw), but I've been having problems troubleshooting a carb issue. I have a 2001 Merc 60 carb model ELPT 4S, four cylinder, four stroke with carbs. At first it was bogging under initial acceleration and after much clean the carbs from old gas and other junk, I got it cleaned up where I can get to about 4000 RPM and it bogs out again. If I back off the throttle quickly it'll stay running, but if I don't the motor will die out.
Have a question, in the pic is a blow-up of my carbs and I've circled two parts that aren't in a parts listing. A 'nozzle' in the upper half, intake side has a very small hole at the top facing the throttle butterfly, and it mates with what appears to be a round passage from the bowl with an inserted square brass plug inserted in the hole. The spaces between the square peg in the round hole appear to be very small passages.
I've looked everywhere and can't find their purpose, although I suspect this is another circuit that helps with higher throttle opening. Can anyone verify this, or, if not, tell me what they are for.
I finally got some GumOut carb n choke cleaner and sprayed and soaked both halves of this mystery circuit and blew them out with my air compressor blow gun with rubber nozzle. The top 2 carbs cleaned out good, but the two bottom ones needed more soaking before blowing cleaned them out. Hopefully this will fix my problem. But I'm waiting on a water pump kit before trying the motor again in the water.
Have a question, in the pic is a blow-up of my carbs and I've circled two parts that aren't in a parts listing. A 'nozzle' in the upper half, intake side has a very small hole at the top facing the throttle butterfly, and it mates with what appears to be a round passage from the bowl with an inserted square brass plug inserted in the hole. The spaces between the square peg in the round hole appear to be very small passages.
I've looked everywhere and can't find their purpose, although I suspect this is another circuit that helps with higher throttle opening. Can anyone verify this, or, if not, tell me what they are for.
I finally got some GumOut carb n choke cleaner and sprayed and soaked both halves of this mystery circuit and blew them out with my air compressor blow gun with rubber nozzle. The top 2 carbs cleaned out good, but the two bottom ones needed more soaking before blowing cleaned them out. Hopefully this will fix my problem. But I'm waiting on a water pump kit before trying the motor again in the water.