Overfilling Yamaha 4 stroke oil

[mangohater]

Just wondering what short, and long term damage results from filling the oil resevoir completely to the top of a 2001 F100 4 stroke yamaha.<br />The boat was driven for several days. User complained of boat bogging down at higher rpm's, stalling out at lower rpm's, and being very hard to start. <br /> I performed 100hr service, draining the oil and refilling it to the proper level. The boat now performs fine. <br />Has anything bad happened? This boat has 1000 hrs on it and runs excellent today.

 

[Dhadley]

Re: Overfilling Yamaha 4 stroke oil

Are you sure it was pure oil? Perhaps contaminated with fuel?

 

[mangohater]

Re: Overfilling Yamaha 4 stroke oil

The user checked the oil while trimmed up. User then topped up with oil which when trimmed back down, was filled to the top.