Walbro 990 carb and new av 543 intake

[Beat the neighbor's RC]

Just installed the new carb and intake to hopefully make starting the Rampage easier. Still hard to start. Anyone know what high low needle setting should be for this carb? Figured it would come preset. I can get it to start but it wears out my arm and once it runs it wants to bog out after running for 5 minutes or so. Lean out the idle?


Thanks for any input or help.

 

[Ildy666]

Is ur fuel tank vented? Take off the cap and see if it runs better...

 

[Beat the neighbor's RC]

Tank is vented. Ordered a power starter from Killer RC, hopefully that will make it easier to start and tune. Thinking it just needs some tweaking on the carb. Got a new plug coming as well. Got to get it ready to race the neighbors this weekend!

 

[Ildy666]

Good luck...

 

[Phill]

Just installed the new carb and intake to hopefully make starting the Rampage easier. Still hard to start. Anyone know what high low needle setting should be for this carb? Figured it would come preset. I can get it to start but it wears out my arm and once it runs it wants to bog out after running for 5 minutes or so. Lean out the idle?Thanks for any input or help.

I started at 1 1/4 on the low but ended up running it at 3/4 after tuning

 

[Beat the neighbor's RC]

Thanks Phill, will try that.

 

[Phill]

Thanks Phill, will try that.

They are all different

Once you get it going it's just a matter of fiddling

Use VERY small adjustments on the needles til you find the sweet spot

 

[PrjctStrtFrce]

If there are tuning issues, then a power starter will not make anything easier.

 

[sportyy]

Wt990 setting

Low 1 1/8 high 1 5/8 on carburetor WT 990

 

[RampageHopUps]

Low 7/8" High 1 1/4"

 

[phreerider]

Low 1 1/8 high 1 5/8 on carburetor WT 990

START HERE

do low first . closing to even smooth sound with maybe towards slight speed increase , find "in the middle" somewhere.

after warm up, test transition to hi if bogs start closing hi, a click or 2 and run it up to speed...repeat til...

tops out without breaking up and favor a fatter setting BELOW PEAK

Low 7/8" High 1 1/4"

FINISH here.... depend so ON TEMP/HUMIDTY/elva., your gas/mix , the pipe...

 

[Phill]

Low 7/8" High 1 1/4"

What about on a G290 Rob?

I have to richen the low to start it then lean it off to run

 

[RampageHopUps]

Each engine is different. The 990 typically runs less turns, so you have to go that low sometimes.

 

[Phill]

Each engine is different. The 990 typically runs less turns, so you have to go that low sometimes.

Thanks mate

 

[ika]

Tank is vented. Ordered a power starter from Killer RC, hopefully that will make it easier to start and tune. Thinking it just needs some tweaking on the carb. Got a new plug coming as well. Got to get it ready to race the neighbors this weekend!

I have hard start problem with keller rc power starter too.

Have you installed power starter ???

 

[Jay337]

I have hard start problem with keller rc power starter too.Have you installed power starter ???

want to know also

 

[Phill]

I have hard start problem with keller rc power starter too.Have you installed power starter ???

No need for a power starter

It will just help you flood it faster

How's your spark?