Ok smart guys, I have an interesting dilema. I have a 1984 Mercruiser 2.5L 4cyl with an Alpha 1 drive. During my tune up (recently purchased the boat) I am doing becuase unknown when last was done. I had a issue with not being able to get the Idle RPMS down enough to where they are supposed to be. So after a weeks vacation to Montana, I ordered a carb kit for it, went to disassemble the carb last night and start soaking it I ran across something wierd... So here is my question(s)
I have what I believe is a mercarb (only 1 idle mix screw) I got the air horn off the float bowl no problems there, not starts the miss matching with the book. The accelerator pump doesn't look like the ones in the pictures in the manual for a mercarb it looks like the ones in the Rochester. Also there was no Screen, clip, or check ball in the accelerator pump well. Just a return spring that doesn't want to come out. so I get the insides apart and appears to be more of a resembleance to the Rochester carb the the mercarb, I turned it over to remove the throttle body assembly and to my surprise there are no screws to remove this, looked a little closer and the carb is just a single peice.... the gaskets that came with the kit match up so I don't think that is a problem its just a little strange. Any thoughts as to what type of carberator this is. I know its a marine carb has the stencil in the float bowl still but no tag. If I go by the numbers stamped on the carb it was MFG in August of 83. The boat is an 84 so thats fesilble..... Im stumped as to how to get this thing throughly clean and I don't want to screw it up by trying to use brushes ect to clean out passages...
I have what I believe is a mercarb (only 1 idle mix screw) I got the air horn off the float bowl no problems there, not starts the miss matching with the book. The accelerator pump doesn't look like the ones in the pictures in the manual for a mercarb it looks like the ones in the Rochester. Also there was no Screen, clip, or check ball in the accelerator pump well. Just a return spring that doesn't want to come out. so I get the insides apart and appears to be more of a resembleance to the Rochester carb the the mercarb, I turned it over to remove the throttle body assembly and to my surprise there are no screws to remove this, looked a little closer and the carb is just a single peice.... the gaskets that came with the kit match up so I don't think that is a problem its just a little strange. Any thoughts as to what type of carberator this is. I know its a marine carb has the stencil in the float bowl still but no tag. If I go by the numbers stamped on the carb it was MFG in August of 83. The boat is an 84 so thats fesilble..... Im stumped as to how to get this thing throughly clean and I don't want to screw it up by trying to use brushes ect to clean out passages...
