Sidhewynder
Cadet
- Joined
- Dec 15, 2010
- Messages
- 17
Hi Everyone,
I have a Mercury 500 Serial #4286099 (1975?) that I'm trying to breathe life back into. After cleaning the carbs and putting in a new water pump impeller (and reinstalling the LU about a million times to get neutral and reverse) I now have it running and spitting water.
In order to keep the motor running I have to have the high idle lever full up, which leads me to two questions: How do you set the idle and adjust the throttle cable?
1) Cables - I moved the throttle lever until the butterfly in the carbs was completely closed, then I put the control lever in neutral and adjusted the barrel on the control cable until I could attach the end fitting on the cable to the throttle lever without moving the throttle lever. Is this correct?
2) Idle adjust (twin carbs) - do both carbs control the idle, or is it just one? If one, which one - lower or upper? To increase the idle do you screw the metering screw in or out? I was adjusting mine and there didn't seem to be any appreciable difference.
One last question - about the hose connection on the motor. The male connector on the motor doesn't seem to have any internal pieces (like a pin or ball) to seal the connection. The female piece on the fuel line has a ball. The result is when I unplug the fuel line, fuel drips from the male connector. I've tried looking at schematics to see I can identify internal parts, but they aren't detailed enough to answer my question. I'm wondering if someone gutted my connector at one time for reasons unknown. If they have, will this impact my motor when running, or will it just be fuel drips out when I unplug and I have to pump the bulb a few more squeezes when I re-attach?
Thanks to your postings the Ole' Merc is breathing again.
I have a Mercury 500 Serial #4286099 (1975?) that I'm trying to breathe life back into. After cleaning the carbs and putting in a new water pump impeller (and reinstalling the LU about a million times to get neutral and reverse) I now have it running and spitting water.
In order to keep the motor running I have to have the high idle lever full up, which leads me to two questions: How do you set the idle and adjust the throttle cable?
1) Cables - I moved the throttle lever until the butterfly in the carbs was completely closed, then I put the control lever in neutral and adjusted the barrel on the control cable until I could attach the end fitting on the cable to the throttle lever without moving the throttle lever. Is this correct?
2) Idle adjust (twin carbs) - do both carbs control the idle, or is it just one? If one, which one - lower or upper? To increase the idle do you screw the metering screw in or out? I was adjusting mine and there didn't seem to be any appreciable difference.
One last question - about the hose connection on the motor. The male connector on the motor doesn't seem to have any internal pieces (like a pin or ball) to seal the connection. The female piece on the fuel line has a ball. The result is when I unplug the fuel line, fuel drips from the male connector. I've tried looking at schematics to see I can identify internal parts, but they aren't detailed enough to answer my question. I'm wondering if someone gutted my connector at one time for reasons unknown. If they have, will this impact my motor when running, or will it just be fuel drips out when I unplug and I have to pump the bulb a few more squeezes when I re-attach?
Thanks to your postings the Ole' Merc is breathing again.