Flooding - Snowmobile Forum: Your #1 Snowmobile Forum

gatorhator98 · 11-06-2009, 01:28 AM

My xc 700 is flooding for no apparent reason. I had the carbs off for a while waiting for a new jet. I twisted the old one too far and broke it off. After i put it back on it started first pull and ran for a while. It idled pretty slow and then died. I started it again this time having to put on about quarter Throttle. Then it idle for a while again(slowley) then died. This time it wouldn't start again. I drained the crank and there was quite a bit of fuel in there. It's not the pump. all diaphrams are perfect. What could this be and how do i fix it. I'm assuming the slow idle is also part of a too much fuel problem because the crabs were synced last spring.

**BC_Dan** · 11-06-2009, 01:50 AM

Could be you have an inlet needle that is sticking open, allowing the engine to flood... or a float that is not set properly...

gatorhator98 · 11-06-2009, 02:30 AM

Is the inlet needle the one wiht thelittl erubber tip on it connected to the float?

600BlairMorgan · 11-06-2009, 02:33 AM

TwinsofMLB · 11-06-2009, 09:59 AM

Quote:

Originally Posted by gatorhator98

I'm assuming the slow idle is also part of a too much fuel problem because the crabs were synced last spring.

Gotta make sure those crabs are in sync!

Replace the plugs.

gatorhator98 · 11-06-2009, 01:19 PM

I think the needle seats are bad. Whe i held the needle and slide all the way close di could blow air through the main jet fairly easily. aren't these supposed to be sealed?

**BC_Dan** · 11-06-2009, 01:32 PM

yes. Good idea to replace 'em, or maybe remove and give a really good cleaning...

gatorhator98 · 11-06-2009, 03:11 PM

The inlet needles are good. I blew the five pounds of air and it held. The floats are now level wiht the carb body when you hold the carb at an angle. It still is flooding and just dripping out the exhaust ports. Is it the jet needle because when it's all the way down i can blow through the main really easy.

**BC_Dan** · 11-06-2009, 04:08 PM

The jet needle/needle jet only meters fuel when it is going from the main through the jet at mid-range. Fuel going into the fuel bowl goes through the inlet needle/seat and is shut off by the float. If there is gas dripping out the exhaust ports, it has to go past the inlet needle/seats to get into the engine. About the only other way that fuel can enter the engine is through the fuel pump via a hole in the pump diaphram. That is not common, but is a possibility. If you pull the line from the engine to the fuel pump (impulse line), there should not be any raw gas in that line. If so, you have a diaphram leak...