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too much engine oil

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ajitpal

New member
I just bought a new pontoon with new Yamaha 250 vmax sho outboard. I take to the lake three time for 5hour.and I found engine is not performing good. Bad smell in smoke look like engine is overheating but not sure slowing down.I came back and when the engine is cool I check the engine oil dip stick was surprise it shows too much oil almost more then twice of two mark point.

I took to the dealer he said sorry to me for there mistake he also verified it is twice the oil what it should be.... but my question how much it effect the the engine. If not then might be in long run. Because we push too much and we put the too much presser on engine. I want to know the possibility
 
Unbelievable! Twice the oil that should have been in the engine? Overfilling a 4-stroke's oil can be (and is) a very bad thing. Unlike a car, cylinders in an outboard are horizontal, not verticle. The question is how much oil was forced into the lowest cylinders and was any damage caused. Obviously oil was being forced around the rings if it was smoking as you explained and, rest assured, there was excessive stress being placed on components as it wasn't performing as it should have been.

I personally would take it to a local mechanic (any auto mechanic will do) and have them check the compression on all cylinders. It won't take more than a few minutes. I wouldn't take it to another Yamaha dealer as they are thick as thieves (just like contractors) and any will know exactly where the engine came from when they search the serial # in the Yamaha database. If the lower cylinders read less compression than the top cylinders I'd be taking those readings back to the dealer and telling them they have a major problem on their hands and you don't want that engine back until all cylinders are reading virtually identical compression... I mean, its a brand new engine! That dealer that screwed up will never tell you the engine could have been damaged and they certainly aren't going to run compression checks on the cylinders to confirm any damage they may have caused. Simply draining oil will stop the smoking and it will run better but is it running like a brand new engine should that you've never had the opportunity to get used to and establish a mental baseline for what normal operation is? You'll never know.

I'll be interested to hear other responses but this is the 1st thought that comes to my mind.
 
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