So I don't like this but as there's pics involved here's a link.

http://bbcboards.zeroforum.com/zerot...postid=1261996

So take a look at the pics!!! a very close look & this um is a "dealer"
saying it's all down to the owner??? because they didn't use the really
really expensive dealer only oil???

This is the sort of damage expected from an engine that has lapsed into
severe detonation!!!

Honestly this "dealer" (presumably of something) will get the woody
spoon big time for actually posting the pics in a public forum of
exactly how these things go out.

Remember despite numerous requests to the NG OMC & ex OMC dealers,
they've never even admitted to ever having seen a failed ficht!!!:-)

So in a way we should all be grateful to this bloke, because in his
usual zeal to blame the owner (classic OMC derived BS being carried on
this time it seems) he's well belled the cat:-)

"Normal" aluminium melts at about 660C but petrol has an autoignition
temp of 246C (if any mixture comes in contact with anything over 246 deg
C it autoignites, search previous posts for detailed explanations). The
fact that there is outright melted aluminium in there & it's not just
around the circumference means the temps inside the chamber were well
past the autoignition point of petrol.

Don't forget according to the spruikers' claims flogging this latest
experiment, this isn't even "normal" aluminium!!! it's their super
duper, get it while it's hot, high temp resistant type; so the mind
boggles at what temps there might have been in the-)

Anyway suggest you save the pics to a safe place (as I have:-)) because
despite the endless opportunities to do so you don't oft see the results
of lean mixtures at power (well as a deliberate design feature
anyway:-)) coupled with poor atomisation from too low an injection
pressure through not much better than a spring loaded garden hose nozzle:-)

Too much fun; even I don't deserve this. I mean when OMC went feet up in
a table drain I thought all my christmases had come at once & it just
couldn't get any better, but gee these blokes are really going well this
time.

K

E-Tec Oil substitution question? (bigfish) » 3:06 PM 10/21/2006
Reply Edit

Here are some pics of what happen's after running 80 hours on oil that
is not suppose to be used. I don't know what went went thru these guys
heads. Yes you can use other oil in a pinch, but be sure to change back
to XD100 when you get back.


E-Tec Oil substitution question? (RUSTY63) » 8:49 AM 10/23/2006
Reply Edit

By the way Bill, that looks like a pic of a carb motor.

Here is another pic. Still look like a carb motor????

E-Tec Oil substitution question? (rudetech1) » 10:33 AM 10/31/2006
Reply Edit

I agree, looks like a classic preignition problem goin on there. I think
something else is happening there besides just the cheap oil.

E-Tec Oil substitution question? (jgwufgator) » 1:03 PM 10/31/2006
Reply Edit

Melted aluminium. See how the edge of the piston is melted away right
down to the top ring by the ex port. Usually caused by lean condition,
overheating, too much ign timing etc...