thrllskr
Converted Coucher
- Location
- Hoboken, NJ
Got my primer kit yesterday. Can someone briefly explain where in the fuel system this will go? Thanks.
Primer Install Q's
- Thread starter thrllskr
- Start date
hangtime
Speak up ,don't kiss azz
- Location
- WORCESTER,MASS- HAMPTON N.H.
Oh boy here comes a nice discussion .:bigeyes:
Mine is in the return line where it dips down a bit so there is always fuel in there .
A lot of guys say not to put it in the main line because of potential air leaks but I had one in there for years with no problems but none the less I put it in my return line anyways .
Mine is in the return line where it dips down a bit so there is always fuel in there .
A lot of guys say not to put it in the main line because of potential air leaks but I had one in there for years with no problems but none the less I put it in my return line anyways .
DAG
Yes, my balls tickled from that landing
- Location
- Charlotte, NC
return line wil work most of the time.. but there no reason not to install a T fitting stright from the main fule line...
thrllskr
Converted Coucher
- Location
- Hoboken, NJ
Tx guys. Any guidelines on how far it should be from the carb - probably doesn't matter but I'm not sure.
an air leak can happen in the return line too.
the fact is, if ANYthing is leaking, your tank wont hold pressure. if everything is installed right, there shouldnt be any air leak.
the fact is, if ANYthing is leaking, your tank wont hold pressure. if everything is installed right, there shouldnt be any air leak.
DAG
Yes, my balls tickled from that landing
- Location
- Charlotte, NC
try and make the primer lines as shorrt as posable w/o getting a bend/crimp in the line..
Matt_E said:
the return line is pressurized too. if the tee gets installed like hangtime mentioned, in a dip where theres always fuel, the tank pressure with force it through the primer all the same.
Matt_E said:
sorry, matt. gotta disagree again. i think theyre equal. they both go to the tank which is just a hollow tank. you cant have 2 pressures in one area. if theyre not equal, the feed line would theoretically be under less pressure since the carb is sucking the gas through it via a vacuum. the return line would, then, have more pressure because the carb is "pumping" gas through it.
but thats a silly theory, because we all know that the pressure is equal in the feed and return.
now stop babbling!
DAG
Yes, my balls tickled from that landing
- Location
- Charlotte, NC
Convert to premix and use the oil tank "now full of gass" for the primer
running 2 tanks is the only way i think you can get these guys to stop arguing:smashfreakB:
-grif
running 2 tanks is the only way i think you can get these guys to stop arguing:smashfreakB:
-grif
sflsurfrider said:
I'll keep babbling, but I oughta know better. The return line doesn't return as much fuel as the in lines carry in. After all, the tank does empty, doesn't it? :frown: You're forgetting air getting into the tank to replace fuel.
Since all my fuel lines are the same ID, they cannot be under the same pressure then.
beachedflunkey
wavejunkies
- Location
- Virginia Beach
Actually, if you got a *******ty primer bulb, just get rid of it. My ski occasionally revved away mid-air for the last few rides before my bulb just popped out. I removed it, pinched off the lines and it ran great. Now I have the pump style and still no problems. This bulb was only seven mos old... I run mine in the reserve line, btw.Matt_E said:
DAG
Yes, my balls tickled from that landing
- Location
- Charlotte, NC
reserve line will work as long as its not a feeder line to teh carbs... alot of people dont run reserves and use it as another pickup
Matt_E said:
just because theres more fuel in the line, it doesnt mean its under more pressure. it just means theres more for fuel the primer to grab:biggthumpup:
If there's more fuel in the same diameter line, then it is under more pressure. :Banane01:
But we're chasing our tails here. Bottom line: If you got a good primer pump that does not leak, installing it on the fuel in line is not a problem.
If you do have a bad bulb, using the return line can alleviate the leaking problem somewhat.
But we're chasing our tails here. Bottom line: If you got a good primer pump that does not leak, installing it on the fuel in line is not a problem.
If you do have a bad bulb, using the return line can alleviate the leaking problem somewhat.
Matt_E said:
incorrect! fuel under 1 psi is under the same pressure as fuel and air under 1 psi.
whats heavier? a ton of feathers or a ton of bricks?
a-ha! theres my tail!:arms:
grifnasty said:
why wont the reserve work for a primer if its a feeder line to the carb(s)?
thats how my x-2's and super chicken are plumbed. all three hold great pressure and theres always premix for the primer to draw.
Matt_E said:
Actually, no, it is the same pressure. The area between the fuel pump check valves and restrictor is a higher pressure than the fuel lines/tank, and the area between the needle valve/jets is a lower pressure.
Regardless, it doesn't matter where you put the tee fitting unless you have a problem where you need to prime a lot, then you would need it in the feed line because the return line will run empty and the primer will just suck air out of the tank.