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Old 11-16-2014, 01:53 PM
joeE joeE is offline
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Join Date: Jan 2006
Location: NW lower MI
Posts: 97
engine storage

i have seen fuel stabalizers fail, i have never seen 2 cycle oil fail. some of you are old enough to remember the pre injector days. you could leave that artic cat or ski doo in the barn for 3 yrs, pull the rope 10 times & drive away.
as fuel evaporates it becomes volital & brown varnish, then sticky and if left, will grow moss. adding oil greatly slows that evap down.
drain tank & carb (you can leave in this state but run risk of condensation)install just enough chain saw gas in tank to run 5 min. after running, top off w/reg fuel. as extra, you can turn on petcock every couple months to keep carb full. your good to start & go in the spring.
if you allredy have trouble, the pilot (idle) jet gets gummed (varnish) up first. eng stalls without choke. (choke system by passes idle circut).
remove bowl & float, pull a wire from w brush, put flat spots in it with dykes & ream idle jet, make sure float & needel move freely, your good to go.
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Old 11-16-2014, 05:51 PM
joeE joeE is offline
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Join Date: Jan 2006
Location: NW lower MI
Posts: 97
for more indepth service. the pilot circut runs from the idle jet up to a tiny hole(s) on the eng side of carb butterfly. a 2nd passage starts as a little hole at the edge of the ventura (big hole) , that might then go straight to the pilot circut & join it just before the hole that spits into throte. as a air intake for idle mixture. so it might pass by 1 of 2 screws, air adjusting screw (if on intake side of butterfly) or a fuel adjusting screw (doing the same job, on the engine side of the butterfly. so carb cleaner or compressed air may squrt from 3 holes when sprayed into the 4th. use the red hose that comes with can, spray in pilot jet, it must squrt into carb or its cloged. those holes are so small there hard to see until you see cleaner comming out.
on some newer smaller engines you cant find the idle jet, they want you to tuy a new carb. they call them nonserviceable. remove needed parts from carb & soak in desil/kerosen & oil for about 3 weeks. blow all w/hi pre air & hope for some luck.
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Old 11-19-2014, 10:58 AM
joeE joeE is offline
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Join Date: Jan 2006
Location: NW lower MI
Posts: 97
in the spring, check your air intake box for mouse nest. they filled one muffler with popcorn. it shot popedcorn for about 5 mins.
they like to chew plastic off wires & rubber off hoses.

Last edited by joeE; 11-19-2014 at 11:07 AM.
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  #4  
Old 12-01-2014, 03:22 PM
joeE joeE is offline
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Join Date: Jan 2006
Location: NW lower MI
Posts: 97
a engine runs on a fuel~air mixture. the fuel ratio is 15 times higher when the eng is cold compaired to normal running temps (hence the choke). if you constantly leave the choke 25% on the eng will seem to run fine but it will foul spk plugs. because to much fuel is being dumped into the eng producing to many unburned hydrocarbons. over time carbon could form on piston crown & cylinder head (squashband). excess carbon will cause higher compression if not de-carbonized.
so i suspect that would be similer to putting a eng in a semi enclosed truck or trailer without an outside exit pipe for the exhaust....... or maybe not.
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