[imported_gremlin_390]

check if the tank lid is seated all the way. mine has a problem that it doesnt close all the way and i have to force it the rest of the way and then put a custom spring from the tank mount to the lid to keep it shut.

Also, the needle settings for the S-25 from factory are:
-high speed needle - preset 4.5 turns from bottom, 2.5-3 turns from bottom after break-in
-low speed - 3 turns from bottom, 2.5-3 turns from bottom after break-in.

a good way to check if the carb is leaking is to hook up fuel line to an air compressor with 5lb pressure in it and plug the air intake and bottom of the carb where it goes into the engine with your finger, and pump air into the fuel nipple under water. i find that its normal for some air to leak out from the throttle piston, but anywhere else is bad.

[John Bakker]

Cracked Gas tanks will only leak when the vehicle is running(tank under pressure) unless it's a big leak .
When in doubt richen the top and bottom needle and tune from there ( 1 hour increments)try the pinch test for the bottom end .
Check for air leaks in the back plate ,carb ,feul line ,feul filter and button

[bpc-rally]

it may be the lid of the tank, i found fuel around the top of the tank aswell?

this is weird, i just want it to run
and its snowing today so its discouraging me from taking it out to tune it

[bpc-rally]

hmmm today i fired it up and watched for bubbles in the air line, couldnt see any...

i drove it around in the slush and snow (it was fun, yes i know i can ruin electronics). when it came back in after a couple min it was smoking like crazy though, and i still think my needle settings are way richer than hpis. it looked like it was smoking around the cooling head or maybe the header. but it looks like its all seated on, and it idles fine now...

Also i still have a ton of gas all over the tank and i even found some near the front of the car (maybe when i pick it up by the back bumper it spilled out?). i think to play it safe im going to pick up a new tank, this ones lid seems like it could also cause a leak...

[endler]

Originally Posted by bpc-rally

had it running finally. a hobby store here said to put the low end flush with the carb. and the hi end 3 turns out..

the low end was about right, a little on the lean side. and the high end was wayy lean..

for somereason if id WOT it would studder, not like its bogging, like it was short on fuel... so i kept richening the high end, and now its a little better, but its way over 3 turns..

Also it had an odd idle, it sounded like it was "laughing" very unsteady

Keep in mind with the rotostart and backplate on these trucks the loosen off all the time! and create air leaks...just because its used doesnt mean the person fixed it and may be the reason he got rid of it...check the back plate screws and the roto start screws (all maybe even seal it up and use a little dab of loctite on all the screws just so you can eliminate that as a problem hope that helps...

[endler]

Originally Posted by bpc-rally

hmmm today i fired it up and watched for bubbles in the air line, couldnt see any...

i drove it around in the slush and snow (it was fun, yes i know i can ruin electronics). when it came back in after a couple min it was smoking like crazy though, and i still think my needle settings are way richer than hpis. it looked like it was smoking around the cooling head or maybe the header. but it looks like its all seated on, and it idles fine now...

Also i still have a ton of gas all over the tank and i even found some near the front of the car (maybe when i pick it up by the back bumper it spilled out?). i think to play it safe im going to pick up a new tank, this ones lid seems like it could also cause a leak...

also does your tank have the primer? is it the old tank with the front pick up? does the cap seem like it seals ok? take it off hook up 2 pieces of fuel line plug the carb side and blow in the pressure side while tanks is submerged in a sink or whatever..pressure test the tank and if you see bubbles change it obviously...savages had tanks that were front pick up witch starved the engine on acceleration make sure you have the updated tank and no primer...the primer is kind of a headache..one more thing to leak hope that helps

[bpc-rally]

thanks
yeah its got a rear pickup but i think im getting a new one, the cap may be leaking..

i will check the rotostart plate because the smoke was coming around the engine, as i said it might just be the exhaust smoke working its way around though. and plus its -3 so it would make sense for a warm engine to smoke right? im to lazy to take out the engine right now haha

im going to tighten all the head bolts, it seems to be spraying fuel from somewhere and im sure that the cap on the fuel tank isnt sealing.