I'm just finally trying to get my '02 Viper running for the season and I am having a real difficult time this year getting the sled to run on it's own. Are there any tricks to getting fuel to the carbs? I drained and cleaned them last year and I put on a new fuel pump the year before. I usually pour a little gas in the airbox a few times and that has worked before, just not now.
Priming carbs with fuel
- Thread starter mattison
- Start date
Just dry started my Viper today, lots and lots of pulls.
Little gas down each spark plug hole will get it much quicker. May have to do that a few times.
Little gas down each spark plug hole will get it much quicker. May have to do that a few times.
Yup...nature of the beast. We don't even try to start our Yamaha 2 stroke triples without putting fuel down the spark plug holes after they have sat a long time. Sometimes it has to be repeated 3 - 4 times.
x3. any sled that has sat a long time or has no fuel in the carbs needs this done to get it re primed.
Pull the sparkplugs,shut the key off to kill spark and pull the engine over 10 or 15 times to help draw fuel up into the lines and maybe into the carbs.Get yourself a small water bottle and a cap with a nozzle like the kind that used to come on rear end grease ( 80W90 ) bottles,squirt a little mixed gas into each cylinder,put the plugs back in,turn the key on,flip the choke lever on and pull the recoil.Repeat the gas into the cylinders until the engine runs on it's own.
I'm thinking that I should be able to take the pulse line off the fuel pump and manually prime the carbs with a hand vacuum pump? And I just want to confirm that it's the smaller hose barb on the left above the 4 lines ( oil, gas, gas. gas) across the bottom?
Pulse line is on the bottom.That small line your referring to is the oil line. The bottom lines are gas,gas,gas,pulse. I have never heard of anyone trying to pump air through the pulse line to fill the carbs.I have read where pressurizing the fuel tank has worked to do that though.
Thanks for the clarification. I just downloaded a service manual and found that, to test fuel delivery connect a mity vac to the pulse line to verify fuel delivery, so, I figured I'll try to fill the carbs that way before putting the air box back on. Sure wish I had electric start. We'll see what happens tomorrow when I have time to try it.
Since I was unable to use my sled last year, I figured that, because I had cleaned the carbs and drained the fuel from the tank that everything would be good to go this year. I guess not. Apparently over the course of the year the carbs fill with oil since there is no gas to stop it? After emptying the carb bowls of oil and a quick shot of carb cleaner I put everything back together and used a small syringe and hose to fill each of the float bowls before connecting the fuel lines up. Started 2nd pull. Woo Hoo!
Yep fires up, great for sub zero mornings too! I've heard the nonsense that there's no oil in it but if you have no gas/oil mix getting to the engine isn't that the same thing?