Straight gassed BR600

We have one at work for blowing gravel off drives and such.
Coworker decided to use it and when it ran out of gas he filled it with regular gas, ran for 15-20mins....came back to the shop asking why the cap was leaking gas.
As I tried to get the flippy cap aligned I noticed the gas was kind of yellow - asked and he said he just fueled it up
Somehow another gorilla managed to overclock the twist in the flippy cap - not sure how but it was out 30deg or more?
Sent him to the dealer for a new cap and some 2-stroke oil.
After a drain and prime I got it running and it'll fire on the first pull. No compression check yet but it feels weak.
When it dies I hope to convince management a new blower is in order(powerplant money) and the old blower comes home for new engine clamshell didn't search too hard but doesn't seem like much aftermarket is available? any leads?

 

Those are notorious for exhaust valves breaking.

 

2-stroke versions?

 

The only valves on 2 strokes I know are power valves, and I've only seen those in motorsports 2 strokes.

 

I didn't know there was a two stroke version. I've worked on the 4-mix

 

there are 4-stroke versions of the bR600 available now - may be where roundfile was coming from

 

probably why I can't find any aftermarket 2-strokes for it - clamshell in a "pro-grade" backpack blower

 

anyways how does anyone manage to change the alignment of the flippy cap?

 

I'll trade you a toasted Echo handheld blower? My 5 yr old was happy as could be blowing off the walkway and just stopped. Seized, p&c are junk, but I only paid $30 for it 3 years ago. I didn't detect any signs of an air leak so I guess my blower tuning ear.... blows

 

Are you positive its 2-stroke? Just odd to me a model number would be the same if two totally different engines.

 

The first blower I ever ran was an echo -good story:
I used to hand sweep all the greenhouses(150-200') back on the farm, boss picked up an Echo blower one spring and said try this out.

Well the wind was blowing(and I'm a dumbass 14-15yo) so I closed the doors and went to town on hands and knees cleaning the heck out of that greenhouse.....get down towards the end and he comes down to see my progress - yeah "GREENHOUSE GAS" the entire place was filled down to within 6-7' with 2-stroke smoke - good thing I was working on the floor or I might not be here today

 

Pretty sure, no oil fill for the crankcase that I could see.
I know most of the 4-strokes still require mix

 

Stihl 4-mix don't require crank case oil. Mix only.

 

learned something new thanks
Another coworker that has since retired bought this blower(plant money) it's under 6yo - not sure if that changes anything?
It is damm quiet - maybe I'm in the wrong and it is a 4cycle? or the holes in my chainsaws mufflers are too big

 

http://www.stihlusa.com/WebContent/...-BR-500-550-600-Owners-Instruction-Manual.pdf

Page 15 4-mix

 

It's 4mix. Uses 50 to one fuel mix, is a 4 stroke, has valves but no crankcase oil. Good luck with the repairs.

 

The
STIHL 4-MIX engine
features
mixture lubrication and must be run on a
fuel mixture
of gasoline and engine oil.
It operates otherwis
e on the 4-stroke
principle

This engine is certi
fied to operate on
unleaded gasoline and the STIHL two-
stroke engine oil at a mix ratio of 50:1.
Your engine requires
a mixture of high-
quality gasoline and two-stroke air
cooled engine oil.
Use mid-grade unleaded gasoline with a
minimum octane ratin
g of 89 ((R+M)/2)
and no more than 10% ethanol content.
Fuel with a lower
octane rating may
increase engine temperatures. This, in
turn, increases the risk of piston seizure
and damage to the engine.
The chemical composition of the fuel is
also important. Some
fuel additives not
only detrimentally affect elastomers
(carburetor diaphragms, oil seals, fuel
lines, etc.), but ma
gnesium castings and
catalytic converters
as well. This could
cause running problems or even
damage the engine. For this reason
STIHL recommends that you use only
high-quality unleaded gasoline!
Gasoline with an et
hanol content of
more than 10% can cause running
problems and major damage in engines
and should not be used.
The ethanol content i
n gasoline affects
engine running speed – it may be
necessary to readjust
the carburetor if
you use fuels with
various

 

thankyou
only other 4-stroke supposed to be 2-stroke that I've monkeyed with was a Troybuilt Combi that IIRC had crankcase oil

 

This Cub Cadet trimmer I was given last week is 4 cycle with crankcase oil. Went to my local dealer and I ordered a new trigger for under $2.