Engines dies at cruse speed
- Thread starter Pappy
- Start date
Fuel starvation fo'sho'! Make sure the cap is venting, and all fuel system parts are free flowing. Check the screen where the petcock/shutoff screws into the tank.
the tank is a 2.2gal Harley Sporster tank with a vented cap, theres only a 1/2gal of fuel in it.
Miracle solution! Close down the petcock some
I've seen this problem described quite a bit and was having it myself-
I found the solution by accident (also see my thread just posted under general discussion)
The motor seems to have been getting TOO MUCH gas, not too little
As it gets flowing it drowns-
I had the air filter off yesterday and noticed gas coming out of the carb as it was running worse than ever-
I'm just getting through break in, and so I've been wondering about mix- put in more oil and that helped just slightly- but the gas flying out the air intake should have told me-
also, any slight closing of choke IMMEDIATELY cuts power- too MUCH gas, not too little gas
I took out the petcock filter cause I still though too little too- it did help accelertation- which has always been good- under load- but then cut off
Today I had it running about the normal: not great- and left it outside to cool before bringing in baby-
when I went out to get it I saw I hadn't shut the petcock- SOOOOOOOOO,
I thought I'd run the bit out of the line-
I got on and it RAN GREAT- I'd left it slightly open-
So I rode a couple of miles and played with it:
petcock SLIGHTLY open- runs great- NO CUT-OFF!
too open- still stalls, as ever!
not open- kills motor
I'm soo relieved and wish I could tell everyoine having this problem
Carb still leaks though and is obviously the weak link in kit- so I'm asking around if anyone knows where to get a better one-
I still haven't opened up the float bowl- there may be a way to adjust that oer something-
but the answer seems to be FLOODING at cruise speed, not lack of gas
I've seen this problem described quite a bit and was having it myself-
I found the solution by accident (also see my thread just posted under general discussion)
The motor seems to have been getting TOO MUCH gas, not too little
As it gets flowing it drowns-
I had the air filter off yesterday and noticed gas coming out of the carb as it was running worse than ever-
I'm just getting through break in, and so I've been wondering about mix- put in more oil and that helped just slightly- but the gas flying out the air intake should have told me-
also, any slight closing of choke IMMEDIATELY cuts power- too MUCH gas, not too little gas
I took out the petcock filter cause I still though too little too- it did help accelertation- which has always been good- under load- but then cut off
Today I had it running about the normal: not great- and left it outside to cool before bringing in baby-
when I went out to get it I saw I hadn't shut the petcock- SOOOOOOOOO,
I thought I'd run the bit out of the line-
I got on and it RAN GREAT- I'd left it slightly open-
So I rode a couple of miles and played with it:
petcock SLIGHTLY open- runs great- NO CUT-OFF!
too open- still stalls, as ever!
not open- kills motor
I'm soo relieved and wish I could tell everyoine having this problem
Carb still leaks though and is obviously the weak link in kit- so I'm asking around if anyone knows where to get a better one-
I still haven't opened up the float bowl- there may be a way to adjust that oer something-
but the answer seems to be FLOODING at cruise speed, not lack of gas
with the high quality that comes with these engine kits no two are the same. I've found the sweet spot on my fuel tank valve. Sometimes you have to play with them.
Norman
Norman
