INJECTION RELIABILITY

[gymblank3]

Just wanted to canvas the group for opinions on reliability of oil injection
on Rotax 582's; have gotten ambiguous opinions from some who should
know--and was told that Rotax doesn't warranty engine failure if
precipitated by their injection failure...interesting. I need first hand
experiences, got any?

[Mark Smith]

I love injection, have it instaled on everything that has room for
it,,,,,,,,,,,,,

I have seen the external oil tank fall off with resulting problems, but
never have seen a bad pump.

I did see a pump that hadn't been disconnected from the drive gear, and
run on premix, the pump was stuck pretty good and the drive gear was
chewed, sloppy work there though
--

Mark Smith
Tri-State Kite Sales http://www.trikite.com
1121 N Locust St
Mt Vernon, IN 47620 mailto:ma...@trikite.com
1-812-838-6351

[red]

gym,
So far, I'm a watcher of ultralights, but I'm saving up to be an
owner...
I can't talk about Rotax oil injection, but I've owned some
motorcycles that had oil injection. Done properly, it's fine.
I did have one problem, though, and maybe you should consider this.
The oil tank can collect moisture, even if you re-fill it
religiously. The oil pump does not know the difference between water
and oil, but the engine sure does.
One day, my bike engine seized, and we traced the problem to water,
condensed in the oil tank. The manufacturer rebuilt my engine under
warrantee anyway. I had to prevent this from happening again; if
there was a next time, it would be out of warrantee.
I cut the black oil line from the oil tank and used adapters to
install a full circle of thick (1/2" inside diameter) clear tubing.
It came out like this ___O___ where the straight tube was the black
original oil line, and the "O" was clear. Now I could see water
collect in the lowest part of the clear loop, and clean it out when
necessary. Cap off the oil lines when you clean out the clear loop,
so you don't get any air bubbles in the lines. You might want all
clear tubing for oil lines, not just the thick loop, to be sure you
have no air bubbles.
I had to clean out the water/gunk trapped in the loop about every six
months, but I had no engine problems at all, after the loop went in.
A righteous oil tank might have a sediment bowl built in, or some
method of draining water from the bottom of the tank. The bike did
not, so ya gotta look out for yourself there...
Cheers,
Red
--
*************************
no A in my email, please

[Pieter Litchfield]

I can't give you any first hand experience with Rotax engines, but will
suggest as a generality that oil injection has to be better than mixing!!
Are you old enuff to remember the two cycle Saab cars (mixed not injected)??
Well they had an automatic clutch that let them freewheel (coast with enging
idling). Why? Because when you take your foot off the gas, you cut off the
oil as well as the gas supply and the fast spinning engine would seize (did
it...twice). So they just allowed the engine to cut to idle during
freewheel by incorporating an automatic clutch, thereby avoiding a seize.
Properly calibrated, maintained, and installed, this can't happen with oil
injection which allows oiling independent of gas flow. I wonder if there is
enuff air resistance so that when the throttle is cut to idle speed in an
ultralight, the engine revs are somewhat up from idle (question here)? If
not, the concern about lubrication as demonstrated by the Saab is a
non-issue, and the discussion then is one of fouling plugs, etc. While I
have have a lot of experience with both injected and mixed two cycles, I
much prefer the injected - there are more moving parts, but I have never
experienced any failures. They seem to run and start better than the mixed
variety, fewer plug fouling problems, etc. And Rotax has used oil injection
on various engines for years with good results.

"gymblank3" <gymb...@voyager.net> wrote in message
news:3cb044f2$0$35572$bbae...@news.net-link.net...

[Ken Kennedy]

gymblank3 wrote:
>
> and was told that Rotax doesn't warranty engine failure if
> precipitated by their injection failure...interesting. I need first hand
> experiences, got any?

I am not sure of the truth of the above.

Perhaps your source meant to say that he has never heard of Rotax
warranting "engine failure if precipitated by their injection failure",
as the number of such failures is minuscule. I have never heard of such
a failure, but I have heard of (and experienced) two-strokers frying
their engines, suffering stuck rings, stale gas, endless aggravation,
etc., etc., because of mixing (or, lack thereof).

"Better One Glorious Death by Injection Failure, than Ignominious Death
by a Thousand Mixings!!!!"

Do yourself a favour, and stop listening to the same folks who didn't
like CDI ignition when it first came in. (Probably their ancestors
thought unreliable engines would never replace the horse).

Millions of happy boaters, snowmobilers, AND Ullies can't be wrong, can
they?
kk