Re: Hard to start after carb rebuild
bktheking,
(Sorry about the long post):redface:
I want mine to crank as easily as yours does. Should I ask how your motor got sunk?
You're making me think I need to take the carb back off and redo it again.
My new hobby is working on my outboard.
It wouldn't idle at all and it lacked wot power. I might be expecting too much from this motor. It's on a 12' flat bottom jon boat. I've tried trimming the motor and the anti-ventilation plate is pretty much even with the bottom of the boat. It's about 1" high. I don't want to cut the transom down since it rides pretty low in the stern already. I weigh #250 and usually bring one of my boys with me. Each weigh about #180. I bring tackle, one ice chest a trolling motor with battery(battery up front). I put everything I can up towards the front. We almost get on plane.
I bought a carb kit online. I disassembled the carb and soaked it in carb cleaner for about 8 hours. I removed both core plugs and the main jet also. The carb was pretty clean looking but the choke handle was on upside down so it raised my suspicion. I also noticed that it looked like someone tried to remove the brass pipe under the main jet. It was a little buggered up. Like a screwdriver had slipped in there. I thought I could try to remove the buggers from it but they weren't very bad and i was worried I might damage the threads that the main jet screws into. I left it alone.
When i removed the larger core plug I couldn't see through 2 of the microscopic holes under there.
Anyway, I couldn't find the kind of carb cleaner that you soak carbs in, so I emptied the spray kind into a stainless steel bucket and used it to soak.
After 8 hours of soaking I blew everything out with compressed air. i made sure I could see through those tiny holes. I spent 10 minutes trying to get the float exactly parallel. The wire on the needle valve was causing my blood pressure to go up a little. Also, the pin that holds the float in place was too long so I used the old one. I reinstalled the carb and tested it out. At first it spit and backfired. Maybe because I forgot to open the fuel vent on the fuel tank? It's not the first time I've done that.
I finally got it cranked up and it idles nice. It was just difficult to crank after setting for a few minutes. I removed the carb and adjusted the float so more fuel would go into the bowl. This seemed to help with the cold cranking but then i noticed fuel dripping. I removed the carb again and set the float back to parallel.
Before I cleaned the carb it cranked in maybe 3 pulls when totally cold and I didn't need to choke it at all. It would crank on the first pull for the rest of the day.
Now, after warming up it will crank on half a pull but after 3 to 5 minutes it acts like it's cold and takes several pulls to crank and wants to be choked.
I'm going to run the rest of the test you all suggested tomorrow. I need to find a squirt bottle that will pump gasoline. Windex bottles don't work so good.
Compression is 100 on both cylinders.
What I've done so far in the two months that I have owned it
Replaced the spark plugs
Replaced a bad power pack with a used one.
Tested the coils thoroughly
Replaced the water pump .
Rebuilt the tiller handle with plactic washers cut out of scrap.
Found a bad connection in the used powerpack plug, so I snipped it off and used bullet connectors instead.
Rebuilt the carb
