I'm guessing this isn't normal? Echo 3510, been acting funny awhile now so I looked at it. Definitely not running like it used to, like it won't stay in tune or can't get enough fuel. 50:1 red armor but also noticed this red dusting everywhere, maybe it was running lean. thanks for looking!
Hole in top of piston (pic)
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EchoShindaiwaMakitaDolmar
ArboristSite Operative
Dumb newb question: could that be rust?
It's some dusting relating to the red armor oil
EchoShindaiwaMakitaDolmar
ArboristSite Operative
Due to contamination, or is the Red Armor oil actually dyed red? I've never seen Red Armor.
Yup, red
The anti knock additive in gasoline
will cause that color. Are you using a gasoline that contains MMT or using a octane booster?
will cause that color. Are you using a gasoline that contains MMT or using a octane booster?
EchoShindaiwaMakitaDolmar
ArboristSite Operative
Interesting.
That hole looks like it's for centering on a lathe.
The hole doesn’t go all the way through the piston. It’s just a centerpoint for machining.
Spark plug looks OK, maybe a hair lean
Spark plug looks OK, maybe a hair lean
That batch actually had some Echo fuel treatment, the red stuff yeah. last time I use that in a saw.
I agree with Jellyroll. This motor shows MMT deposits.
The hole in the piston is a non issue , just a machining alignment centre as advised , typical oem Echo piston trait , seen it on a few aftermarket snowmobile racing pistons also . As for the colouration , I have witnessed this colour as either orange to bright red within numerous race gas fueled snowmobiles & bikes . Usually octane boosting additives are the root cause . I agree that manganese tricarbonyl is most likely the culprit as Jellyfish & Kevin has indicated . I briefly used such a additive within my Dynaglide due to lack of adequate octane gas while on a trip down state . Actually Canada is currently considering removal of MMT within their unleaded fuels , due to potential higher Nox emission issues apparently ?
Echo is notorious factory lean , have you retuned ( fatter) from the factory setting via removing the limitors , since you never mentioned how many hours are on the saw brother . Also changes within ambient temperatures or barometric pressure or dirty air filter can really effect your state of tune on these small engines ?
I was going to mention that Canada uses MMT in their pump fuel still.
Yeah i wouldn't be using that. Pull you limiters as well and richer it up the mixture screw some.
Yeah , health reasons also in confined areas although , not at benzene hazard levels which have been lowered within pump gas significantly but suspected central nervous system effects potential . Not sure where it is at currently as far as legislation over here ?
Sometimes we go over the recommended manufacturers additive levels , a little more won't hurt anything right ?
It isn't used in the US. It was thought there might be potential health issues with it and also issues with fouling catalytic converters.
I don't know the validity of either issue as the EPA quashed its use around the time MTBE/ETBE was phased out. This is going by memory as it was 20 years ago roughly.
Yeah , its been around for close to 50 yrs not sure if at current levels . I remember O2 sensor failures & 2nd generation Cats plugging issues , till they changed the pellet densities & shell thickness to achieve a hotter burn rate within the converter . I guess we will see where it leads to up North here ? I doubt very fast with Trudeau still at the helm , He's more interested in banning handgun ownership lately !
Handguns have for all practical purposes been banned for years in CA.Yeah , its been around for close to 50 yrs not sure if at current levels . I remember O2 sensor failures & 2nd generation Cats plugging issues , till they changed the pellet densities & shell thickness to achieve a hotter burn rate within the converter . I guess we will see where it leads to up North here ? I doubt very fast with Trudeau still at the helm , He's more interested in banning handgun ownership lately !
Mean while here in MT, US I can open carry, concealed carry with no permit and I can just walk into a store and buy one.
