top end smashy
- Thread starter sledneckddot
- Start date
thinkin crank seals were sucking in air, went lean and top ring caught exhaust port and smashy!!! guess i should done a leak test before i took her out, oh well, ordering up a 781 big bore from jetmaniac, will rebuild this one when i have time, danm shutdown season, not much time to play in the garage
- Location
- Vegas
I had the Same problem....
- Location
- baldwin ny
that looks like no oil
pretty sure it had oil, 50 to 1 premix amsoil dominator/91 octane gas, the other piston and cylinder look great
SkiDiggity
formerly kawirider142
did it run really good before that happened? heard once they lean out they scream and make great power.. then BOOM! sorry to hear that is how you started the season though :/
You always hear that. And yet, in eight years of haplessly tuning carbs and often getting things too lean, they somehow always run like utter
like that.It was running good that day and I checked my plugs, and they were a light brown so I thought it was ok. Started tearing into the bottom end, found a crack in the front seal....
Yami-Rider
TigerCraft FV-PRO
- Location
- Texoma
Running amsoil doesnt help matters either ... I have had bad luck with that stuff.
... I have had bad luck with that stuff.
- Location
- Cruising Around
I'm sure Amsoil would be very interested in your 3rd party testing.
Yami-Rider
TigerCraft FV-PRO
- Location
- Texoma
It was a customers boats, had a yamaha 225 4-stroke outboard motor with around 600 hours.
He got talked into running amsoil, so on his next oil change thats what I put in it. After he ran that oil for 100hrs (about 2 month..He is a fishing guide) the motor started using oil, maybe a coincidence...that motor is now retired. His new Yamaha 225 has almost 900 hrs (did oil change on it a month ago) has never seen amsoil and doesnt use oil. This was years ago, so maybe their oil is alot better now.
Yami-Rider
TigerCraft FV-PRO
- Location
- Texoma
The fact that it started using oil after running amsoil...Like i said it could of been a coincidence. I just thought it was weird it happened right after he started running this oil. I know i wont ever run the stuff, i dont want to chance it.
Running amsoil doesnt help matters either
Blue and I have been using amsoil dominator for years with great results. Just did teardown inspections on my 1 1/2 year old BB with many hours and lots of water ingestion, etc. and engine looked new inside. Blue's 850 was 2 years old with even more hours and same thing. Both motors have lots of compression (200-215psi) and pin bearings and SBT cranks still kicking.
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How do you know that within 100 engine hours, the only factor that caused was the oil?
Is that fact falsifiable?
By what mechanism was the oil itself causing such abnormal wear in the motor to cause that level of blow-by?
Upon tear-down and careful inspection of the motor (right?), were the internal parts exhibiting signs of abnormal, oil-induced signs of wear?
All I am trying to point out is that you're equating correlation with causation. Last time I blew a motor, it had been in the saltwater only 20 hours prior. That doesn't mean the saltwater caused it.
Claiming that abnormal engine wear within 100 hours - 2 months - after changing the oil was caused by that oil, without any supporting evidence, would get you laughed out of any court.
You may have a gut feeling about it, but you should realize that that's all it is, and nothing more.
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- Location
- michigan
hey everyone has opinions. i would say that amsoil is more directed toward race applications and such. thats all i run in my 2cycle engines, higher compression stuff that i rip on. im taking about dominator or interceptor. i don't know what amsoil you put in the 4cycle outboard. i think it does say its good for oil injection but i hate oil injection anyway. i stick to whats been proven for me as an individual. i have a gal of maxima that i got from someone not use to it but ill have to run it out at some point. :dunno:
- Location
- michigan
funny how this started with a bad top end and ended up in a court case about bad oil. haaaa.