Hi There!
We have been having a hard time trying to figure out what is causing a hesitation or misfiring on our boat. When you first get it going and warm it up it is initially fine. After 10 min or so the problem arises. If you try to push it past 3000 or so it starts to hesitate, miss, bog. What I've done so far:
New distributor cap, rotor button, points, condenser.
Had distributor springs, weights, etc serviced
New wires and plugs
Checked anti-siphon valve
Changed out fuel
Changed filter/water separator
Checked timing
Checked dwell angle at various rpms
Cleaned carb and during this seems like the bowl is nice and full of fuel
I haven't checked the vacuum but the place where I had it serviced did, they say it is fine. Although it is definitely sucking air through a hole next to the steel line for the vacuum for the choke. Is this supposed to be open? If I plug it the boat runs really rich.
Ordered a new carb from I5. Worked OK when installed but ran rich and I couldn't get it to consistently idle correctly. Sometimes OK, sometimes it would just stall. When I got it up to speed it still kinda seemed like the hesitation/misfire was there. Maybe not as bad..not totally sure. So, reseated mixture screws and turned out 2.5 turns. Was careful not to seat too tight. After this I couldn't get it to work very well at all. Would eventually get it going, but very rich idling. Black smoke, etc. Ended up putting the old carb back on and of course the same issue.
Wondering if anybody can offer any suggestions at all?
Thanks in advance for any help you might give!!
We have been having a hard time trying to figure out what is causing a hesitation or misfiring on our boat. When you first get it going and warm it up it is initially fine. After 10 min or so the problem arises. If you try to push it past 3000 or so it starts to hesitate, miss, bog. What I've done so far:
New distributor cap, rotor button, points, condenser.
Had distributor springs, weights, etc serviced
New wires and plugs
Checked anti-siphon valve
Changed out fuel
Changed filter/water separator
Checked timing
Checked dwell angle at various rpms
Cleaned carb and during this seems like the bowl is nice and full of fuel
I haven't checked the vacuum but the place where I had it serviced did, they say it is fine. Although it is definitely sucking air through a hole next to the steel line for the vacuum for the choke. Is this supposed to be open? If I plug it the boat runs really rich.
Ordered a new carb from I5. Worked OK when installed but ran rich and I couldn't get it to consistently idle correctly. Sometimes OK, sometimes it would just stall. When I got it up to speed it still kinda seemed like the hesitation/misfire was there. Maybe not as bad..not totally sure. So, reseated mixture screws and turned out 2.5 turns. Was careful not to seat too tight. After this I couldn't get it to work very well at all. Would eventually get it going, but very rich idling. Black smoke, etc. Ended up putting the old carb back on and of course the same issue.
Wondering if anybody can offer any suggestions at all?
Thanks in advance for any help you might give!!