nazmen1
Seaman Apprentice
- Joined
- Jan 23, 2009
- Messages
- 39
My 1978 Merc 402 has been resuscitated after not running for a few years..
Repairs from this winter include:
1. New switchbox
2. Stator that meets voltage specs
3. Cleaned up/replaced all the engine wiring.
4. New Fuel Diaphram
5. Rebuilt the Carb
6. Cleaned all fuel lines and filters, new fuel bulb
7. New Water Pump and lower unit oil.
8. Compression is fine on both cylinders.
Had the boat on shake down cruise this weekend. Ran fine in the yard with water in the garbage can. Tested in out on lake.
Ran great at medium to Wide Open Throttle. Engine would stall when idling. Didn't have the right length screwdriver to adjust on the water so I had to bring it home. .
When I got home I was able to richen up the fuel mixture that seemed to help the running at idle. Though it still idles @ 1000 rpm but then cuts out when I put the throttle lever all the way down.
After engine dies, I have to pump the fuel bulb to restart. If I run above 1,200 rpm its ok, but any lower it cuts out.
Couple of questions:
1. Anything else I could do to improve the idle
2. How hard should the fuel bulb be when the engine is running.
Repairs from this winter include:
1. New switchbox
2. Stator that meets voltage specs
3. Cleaned up/replaced all the engine wiring.
4. New Fuel Diaphram
5. Rebuilt the Carb
6. Cleaned all fuel lines and filters, new fuel bulb
7. New Water Pump and lower unit oil.
8. Compression is fine on both cylinders.
Had the boat on shake down cruise this weekend. Ran fine in the yard with water in the garbage can. Tested in out on lake.
Ran great at medium to Wide Open Throttle. Engine would stall when idling. Didn't have the right length screwdriver to adjust on the water so I had to bring it home. .
When I got home I was able to richen up the fuel mixture that seemed to help the running at idle. Though it still idles @ 1000 rpm but then cuts out when I put the throttle lever all the way down.
After engine dies, I have to pump the fuel bulb to restart. If I run above 1,200 rpm its ok, but any lower it cuts out.
Couple of questions:
1. Anything else I could do to improve the idle
2. How hard should the fuel bulb be when the engine is running.