1989 Mercury Classic Fifty 45hp
I?ve done a lot of work on the fuel system on this motor and basically everything starting at the carbs through the tank is new with the exception of the fuel pump housing, motor side fuel connector and fuel line T at the carbs. I was having problems getting air into the system and then the system appeared to be blocked (couldn?t pump any fuel into the system of go above idle) so I opened the fuel pump to be sure it wasn?t obstructed. After doing research online I found that the fuel pump kit I used didn?t appear to be the correct one although it appeared to match what was used by a previous owner. I rebuilt it with the correct kit and put it back on but now when I pump the ball the fuel pours out the bottom carb and the bulb doesn?t get hard. This was not happening before. I opened the carbs up and they looked fine but since I hadn?t replaced the floats when I rebuilt them I went ahead and got new ones. I also got the Mercury needles/springs and did them also. I then set the float (1/4 inch) and put them back. Again when I pump the bulb the fuel runs out the bottom carb. I took them off again and set the height to 5/16 and put them back on but didn?t pump the bulb because it was late and I didn?t want to clean up fuel again.
One thing I did notice is that when I removed the carbs I lifted up the idle level so the top carb bracket would clear easier and I hadn?t put that back down so when I?ve been testing the float levels the idle has been slightly higher than ?idle?. Would that allow fuel to be pumped through the carb? It wasn?t up the first time I pumped the bulb after putting in the new fuel kit.
The only things different from when I was able to get a firm bulb are: The idle level was up a little, the fuel pump has a different kit, new floats and needles (needles were new before but Sieara not Merc.) and I?m being sure I?m pumping the bulb with the arrow pointing up. Oh yes, new (better quality) hose clamps on most of the lines.
Any thoughts on why the carb is leaking? Thought I would put this out there and maybe someone would respond before I get home and spill more fuel.
I?ve done a lot of work on the fuel system on this motor and basically everything starting at the carbs through the tank is new with the exception of the fuel pump housing, motor side fuel connector and fuel line T at the carbs. I was having problems getting air into the system and then the system appeared to be blocked (couldn?t pump any fuel into the system of go above idle) so I opened the fuel pump to be sure it wasn?t obstructed. After doing research online I found that the fuel pump kit I used didn?t appear to be the correct one although it appeared to match what was used by a previous owner. I rebuilt it with the correct kit and put it back on but now when I pump the ball the fuel pours out the bottom carb and the bulb doesn?t get hard. This was not happening before. I opened the carbs up and they looked fine but since I hadn?t replaced the floats when I rebuilt them I went ahead and got new ones. I also got the Mercury needles/springs and did them also. I then set the float (1/4 inch) and put them back. Again when I pump the bulb the fuel runs out the bottom carb. I took them off again and set the height to 5/16 and put them back on but didn?t pump the bulb because it was late and I didn?t want to clean up fuel again.
One thing I did notice is that when I removed the carbs I lifted up the idle level so the top carb bracket would clear easier and I hadn?t put that back down so when I?ve been testing the float levels the idle has been slightly higher than ?idle?. Would that allow fuel to be pumped through the carb? It wasn?t up the first time I pumped the bulb after putting in the new fuel kit.
The only things different from when I was able to get a firm bulb are: The idle level was up a little, the fuel pump has a different kit, new floats and needles (needles were new before but Sieara not Merc.) and I?m being sure I?m pumping the bulb with the arrow pointing up. Oh yes, new (better quality) hose clamps on most of the lines.
Any thoughts on why the carb is leaking? Thought I would put this out there and maybe someone would respond before I get home and spill more fuel.
