Runs but I am not satisfied

Danzig · Post by **Danzig** » Mon Nov 12, 2007 10:48 pm

Ok guys-
I have the heads and nuts still holding back water. Carbs have now been gone through 4 times this year. Again dirt was found this past weekend and a total tear down and cleaning again took place. Carbs were put back on today, slides were again checked for synchronization by eye and air fuel mixture screws backed out 1.5 turns. I think my dirt came from the passage between the power jet and main jet area in the bowl bottom. Not sure.

The situation which I would like to gain upon is this. The sled will start with the choke on first pull, it will run at 35000 rpms's for about 5 seconds and then die. Next pull the sled will start and run at 3500 rpms for about 5 second die. Third pull no choke, it will not fire, just a puff of smoke out the exhaust. Fourth pull with choke on it runs, then I quickly shut off the choke and overide the idle for about a minute and it will idle fine between 3200 and 3500. Once the engine is warm after running for about 5 minutes, you shut it off and leave it for about 10 minutes, you try and restart it without the choke it will fire off and suddenly die, turn choke on and it will fire right up and run, then flip choke off and she is idling sweet again. Am asking to much from to say that I would like to flip the choke on and pull it over and have it fire up and run for lets say 30 seconds and then take the choke off and it should idle on one pull?

The fuel being ran is about one month old 94 octane with oil pre-mix at 50:1 and also running oil injection. Plugs are brandnew NGK's and it has a brand new fuel pump to boot. Filters are new, pickup anti-flow back valve is in good condition.

What about a CDI problem? Timing problem? I am having a hard time trying to decipher the correct way to time this engine also. The instructions are vague to me and I have to say I am a bit lost.

Am I too picky?

harleysportster · Post by **harleysportster** » Mon Nov 12, 2007 10:58 pm

Paul,
Did you check/clean the tiny air jet located in the bottom portion of the carb throat on the airbox side.

Danzig · Post by **Danzig** » Mon Nov 12, 2007 10:59 pm

I need to clear up the last post, the second pull, I have the choke turned off. Not on.

Mr. Deere · Post by **Mr. Deere** » Mon Nov 12, 2007 10:59 pm

Danzig I have the same problem except mine wont run when you let off the gas or it will die suddenly when I have it at Half throttle. I was thinking about it running a bit to rich. I almost choked to death on the smoke now I know why they want to get rid of them.

BOB

Danzig · Post by **Danzig** » Mon Nov 12, 2007 11:01 pm

harleysportster wrote: Paul,
Did you check/clean the tiny air jet located in the bottom portion of the carb throat on the airbox side.

If it had a hole and I could get a look at it with a light and see light shining through the other side then I would say yes Harley.

Danzig · Post by **Danzig** » Mon Nov 12, 2007 11:03 pm

Mr. Deere wrote: Danzig I have the same problem except mine wont run when you let off the gas or it will die suddenly when I have it at Half throttle. I was thinking about it running a bit to rich. I almost choked to death on the smoke now I know why they want to get rid of them.

BOB

Bob-
I did have a heavy smoking problem before the last set of head gaskets were changed out. The smoke is still present as it should be but nothing like it was before and I am happy with this. The smoke is blue.

Danzig · Post by **Danzig** » Mon Nov 12, 2007 11:05 pm

In the manual it states to flip on the choke to verify that it is working correctly and if it is, the motor will shut off.

The motor shuts off when choke is turned on.

What if I adjust the choke plungers to open up farther when I have the choke on? Will this give me more choke or totally screw up the works?

Mr. Deere · Post by **Mr. Deere** » Mon Nov 12, 2007 11:06 pm

Mine is but its a LOT. Also when you pull the plugs do yours smoke white smoke. Also will yours fire right up after you dry the plugs and reinstall. Mine will but only 6 or 7 pulls then they need to be dried again. Have you tried drying them by putting the plugs on the cylinders. I did and I got some Fire.

BOB

JDFanPa · Post by **JDFanPa** » Tue Nov 13, 2007 2:08 am

Paul if you adjust the plungers to much it will let gas by even withe the choke off which we dont want. Just as a general rule of thumb when I change a choke cable etc I just adjust the cable until there is maybe about 1/8" of play with the choke off. This has worked for me on other sleds. If you have the sled warmed up and 10 minutes later you need the choke to get it running something isnt right you sure you dont have an air leak at the intake boot/gasket or something. It seems its not pulling the fuel up from the bowl to get it fired I would almost say a blockage but know youve cleaned the carbs well.

qwerty · Post by **qwerty** » Tue Nov 13, 2007 2:25 am

choke it to start, then when it starts to die kill the choke, then intermitently when it tries to die choke it for about 2 seconds. keep doing this for about 45 seconds untill it stays running on its own.

mmmm i love the smell of premix in the morning.

Danzig · Post by **Danzig** » Tue Nov 13, 2007 2:35 am

I guess by the sounds of it, I need to stop by and grab a can of carb cleaner or starting fluid and play around a bit.

qwerty · Post by **qwerty** » Tue Nov 13, 2007 2:43 am

i would crank the idle up to 3000+ this will prevent plug fouling.

Danzig · Post by **Danzig** » Tue Nov 13, 2007 2:45 am

The idle is already over 3000.

HoosierDeereMan · Post by **HoosierDeereMan** » Tue Nov 13, 2007 2:54 am

Paul,

No expert here but I wouldn't get too overly concerned until you get the premix all used up in the tank and are running from the oil injection unit only. With twice the oil in the gas no doubt it will act funny. I would do what you have to do to get that first tank of gas run up. Once its on the injected oil I would read my plugs to see what is really going on. If you are finding crap in the carbs every time you tear them down where is it coming from? Tank? Gas lines? Another thing to consider is that this engine has 0 run time under load. The rings haven't seated yet. Until they do you may have some issues. It was 65 degrees here today, I'm sure it was close to that in Standard. Have you checked the plunger seats on the choke cables? Have you sprayed either around the crank seals and carb flanges to check for any air leaks?

Danzig · Post by **Danzig** » Tue Nov 13, 2007 3:02 am

The temperature here today was about the same Troy. The design of the engine prohibits you to check the crank seals. Carb flanges are new, but will be checked tomorrow via starting fluid treatment. As for the plunger seats, the rubber is in good condition, setup per the manual also for proper stroke. Not sure what else to look for there to be very honest. I was told to put vaseline on the end of the plunger and look at the sealed contact area when they are in the carb after the plunger is removed.

A comment that is baffling me here is to adjust the air fuel mix screw when fine tuning.......ok?? Manual says 1.5 turns out is it. Am I missing something here? How would I know I am fine tuned?? Idle increase like setting up a carb on a quadra-jet off an old Chevy?

I will get this pre-mix ran out. I have 1/4 of a tank in it now, I will top it off with straight fuel tomorrow. Sounds like another X8 problem........just my luck!