FireFighterZero
Captain Zero!
Gas cap leaks on my 460.
Do you change that o ring once in a while?
Do you change that o ring once in a while?
460 gas leak
- Thread starter FireFighterZero
- Start date
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biggun
Monkey for Hire
Or put a piece of plastic bag over the hole before you replace the cap.
Defo works if you find yourself in a pinch.
Defo works if you find yourself in a pinch.
Burnham
Woods walker
The o rings do get worn. I never replaced one, just bought a new cap. Might be a dumb waste of money 
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FireFighterZero
Captain Zero!
- Thread Starter Thread Starter
- #4
Probably not a waste Burnham.
Quite a lot going on in the new style caps.
Better than soaking your groin in gas.
Quite a lot going on in the new style caps.
Better than soaking your groin in gas.
SeanKroll
Treehouser
Altissimus
TreeHouser
On my little Dodge I'll get a yellow light , mechanic with the magic code reader says you need a new gas cap. Okay , done ... next time it happened I just push on the O ring all around to re seat it , same result light goes off.
for the stihl ms460, its a 3.5mm x 25 O ring, pt # 9645 948 7734
hope that helps, just did one on my 360 that started leaking.
Marc-Antoine
TreeHouser
I replace the o-ring time to time when needed. I bought 10 of them at once to not have to put an order just for that.. Same for the oil tank.
Some times, the leak is just due to a wood chip or something stuck here, but more often, beside some compatibility problem with the gas, it's just wear and you can see the flatness on the outside of the o-ring.. There isn't much margin between a too tight or too loose O-ring.
The Stihl dealer near me sells only the whole cap, of course, more money in the pocket. He got me once, Internet since.
Some times, the leak is just due to a wood chip or something stuck here, but more often, beside some compatibility problem with the gas, it's just wear and you can see the flatness on the outside of the o-ring.. There isn't much margin between a too tight or too loose O-ring.
The Stihl dealer near me sells only the whole cap, of course, more money in the pocket. He got me once, Internet since.
Altissimus
TreeHouser
I keep new O rings around also keep a selection of replacement caps mostly used from junked saws , Husqvarna likes dozens of sizes to keep it simple and easy ...
Al Smith
Mac Daddy
That was for the 200T and it was 23x 3 .What happens is the o-ring becomes stiff and to try to compress it breaks the cap .The ethanol content of the gasoline causes that .Just recently I ordered 10 complete after market cap sets because I broke both caps on two 200T's which I don't use those saws that much .What size a 460 would use I have no idea but a little trip to google land might be worth the time .It will be on the internet some place and my book of Stihl IPL's doesn't go that new of saws .
Cobleskill
Treehouser
Grease on automotive gas cap O rings helps them to seal and stops the filler neck from rusting on the sealing surface.
Al Smith
Mac Daddy
I might add to the above late this last fall worked on two consumer grade Husqvarna saws of below 50 CC .Those flip caps are a much better design those used by Stihl in my opinion .
Cobleskill
Treehouser
WTH is wrong with a simple screw on cap? If you fill the oil up on a Stihl you have to drain some out to get the cap on. More surface on cap to pick up dirt with. Lots of down sides. What, to save a few flicks of the wrist to tighten up a cap? Engineers!! Got to make it look like they are brilliant.
Working on modern vehicles it seems like AC is the last thing they stuff in. I changed an alternator last week. The bottom bolt was only accessible with a box end wrench. With about 1 inch of turn. AC in the way. My cars oil filter access is blocked by AC accumulator, from the top and underneath. My older vehicle, same exact engine, no problem. New one had a bunch of wires running right next to the oil filter also. Had to zip tie those out of the way. No thought for routine maintenance operations. Changing some alternators is a major operation. Hours worth.
Working on modern vehicles it seems like AC is the last thing they stuff in. I changed an alternator last week. The bottom bolt was only accessible with a box end wrench. With about 1 inch of turn. AC in the way. My cars oil filter access is blocked by AC accumulator, from the top and underneath. My older vehicle, same exact engine, no problem. New one had a bunch of wires running right next to the oil filter also. Had to zip tie those out of the way. No thought for routine maintenance operations. Changing some alternators is a major operation. Hours worth.
Burnham
Woods walker
Or a starter motor, same thing. And who thought putting a water pump inside the engine was a good idea?
Cobleskill
Treehouser
And run it with the cam belt so it has to be timed.
Cobleskill
Treehouser
On a positive note I took an Echo Timberwolf apart yesterday. Getting ready to pressure test it. Simple, like the old ones used to be. The throttle lock wasn't a booby trap, carb slipped right off, they used all the same size fasteners. Hard to believe.
