1998 yamaha gp 1200 wrong oil ?

[met828]

OK so i believe that the wrong oil was placed onto 2 yamaha gp 1200s that i own. They both have 100hrs on them and both died 2 hrs apart and both died from # 1 cylinder locking up one ceased and one will turn over with a bad clunking. I thought maybe an oil line or carb but just had carb serviced on the one and one machine is a premix and one is oil injected. I have just taken the premix engine out and have torn into it the engine is very clean no rust i have pics i can post of head and engine pics, head is bone dry on cylinder one the others are semi moist. I would like to know if this problem could be from the wrong oil being added to the engines.

[Pale Rider]

Re: 1998 yamaha gp 1200 wrong oil ?

it would have to be run a long time with "the wrong" oil in it. many people buy what`s on the shelf at wally world without paying attention if it is labeled TCW3 or API TC/JASO. Unless someone ran automotive 4 stroke oil with detergents thru the engine I doubt an isolated wrong oil incident is the root cause.
I would look for other areas/failures.
which failure had the recent carb work? no piston wash or head/piston dome dry dictates a lean condition, from carb adjustment/clog/gasket leak and or oil seal air leak at the number one piston...

really need more info to take a stab at what might be the cause... good luck...

what oil did you find was in the ski`s?

[met828]

Re: 1998 yamaha gp 1200 wrong oil ?

well i was told the oil was bought from a shop that pumped it from a 55gal drum into an old 4-stroke engine oil bottle and was told i was amsoil but could not tell for sure, after opening engine up its all 3 cylinders that went on the motor that locked up the engine was dry as a bone on the pre-mix motor which was mixed at a 40:1 ratio. The oil injected ski also went all oil lines are in tack the pre-mix skis carb had just gotten rebuilt had it checked from second shop that said carb was ok, and that it was definitely an oil issue that made the engine go I am just trying to figure out what else could have gone wrong to make both skis go at almost the exact same time. I am just finding it hard to believe that they both went the exact same way. I have taken some pic if it helps determine the cause of engine failure

[Pale Rider]

Re: 1998 yamaha gp 1200 wrong oil ?

you could send an oil sample to Blackstone labs to check and see if they can verify what oil it is...

If it was in fact an automotive 4 stroke oil used as a premix oil, then for sure it would hurt the engine by scaring the cylinders. Automotive oils have way more detergent in them.
sorry to here your issues, anyway to verify what type of amsoil was pumped out of the 55 gallon drum?
personally I would never buy oil this way, for the obvious reasons...
someone made a mistake that cost you 2 ski`s...
IF the oil was Interceptor, or Dominator you should have been fine. Interceptor is very good for premixing and running thru EFI ski`s as it is thinner than Dominator oil...
but in Carb models both can be used...

something just doesnt make sense here, hope you find out what happened...
BTW how long did the ski`s run on this oil?

[met828]

Re: 1998 yamaha gp 1200 wrong oil ?

i believe we had about 8hrs on the one and bout 10hrs or more on the other ski using the "mystery oil" when i asked the shop they just told me that it was amsoil they used. I dont think it was ether of these the oil comes out kinda blue i will have the oil tested if nothing else just for peace of mind, perhaps something in the bottle contaminated the oil that he pumped in there the test should tell that correct?

[Pale Rider]

Re: 1998 yamaha gp 1200 wrong oil ?

i believe we had about 8hrs on the one and bout 10hrs or more on the other ski using the "mystery oil" when i asked the shop they just told me that it was amsoil they used. I dont think it was ether of these the oil comes out kinda blue i will have the oil tested if nothing else just for peace of mind, perhaps something in the bottle contaminated the oil that he pumped in there the test should tell that correct?

well after trying to find out which of their oil is blue, I think it is the injector oil. nonetheless, I believe it is a NO ASH oil and that`s what killed your ski`s...
I also think they are dual rated tcw3 and API TC...
problem is these/this blue oil could be 100:1 ratio, and most likely for outboards...
The only Amsoil to use in the ski`s are Interceptor which is brown/caramel in color which is used for oil injection and pre-mixing, and the Dominator oil which is pre mix for carbs as it is a bit to thick for the oil injection...
after rethinking this, I`d say that blue oil did you in...
I`m not sure but I think several of the injector/outboard oils are blue, can`t say for sure...

you could also research that here> http://www.bobistheoilguy.com/forums/ubbthreads.php

[met828]

Re: 1998 yamaha gp 1200 wrong oil ?

ok this is what i have found on the internet about the hp injector looks like it is not for pwcs after all http://www.bobistheoilguy.com/forums...&Number=480491 http://www.seadooforum.com/showthrea...g-oil-now-what

[met828]

Re: 1998 yamaha gp 1200 wrong oil ?

ok here are the pics one of the piston that is bone dry the other is the inside of the case where the rod went threw the block, also i bought a labeled bottle of hp injector oil today it says on the label mixing 2-stroke oil should be kept to a minimum so after digging and racking my brain looking these engines over took the one all the way apart everything looks ok. Im thinking it had to be the oil after reading amsoil warranty they wont cover the engines if the oil has been contaminated by transporting or dirty pumping practices by an amsoil dealer,also if it is not a labeled bottle or from one of there authorized dealers (not just a sticker on there window) they won't cover engines if they blow, this info is in writing on there website.

[Pale Rider]

Re: 1998 yamaha gp 1200 wrong oil ?

so what`s the outcome here?

[met828]

Re: 1998 yamaha gp 1200 wrong oil ?

Idk bout to replace one engine from sbt then another once money allows. Hope the bt last longer then the hours we put on the two skis. Really just tired of looking at the skis and want to have them on the water

[SMLAKER]

Re: 1998 yamaha gp 1200 wrong oil ?

ok here are the pics one of the piston that is bone dry the other is the inside of the case where the rod went threw the block, also i bought a labeled bottle of hp injector oil today it says on the label mixing 2-stroke oil should be kept to a minimum so after digging and racking my brain looking these engines over took the one all the way apart everything looks ok. Im thinking it had to be the oil after reading amsoil warranty they wont cover the engines if the oil has been contaminated by transporting or dirty pumping practices by an amsoil dealer,also if it is not a labeled bottle or from one of there authorized dealers (not just a sticker on there window) they won't cover engines if they blow, this info is in writing on there website.

That hole in the bottom of your case looks familiar. This happened in my first SBT engine.