ILOVTOFISH
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- Apr 22, 2011
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I just bought a brand new 9.9hp 2stroke yamaha and i know it suppose to run on a 100:1 oil ratio.Here is my problem.I have heard a bunch of controversy regarding the oil mixture on what to run the mixture at when broke in.Even the guy at the marina said to run it at 50:1 after breakin because the 100:1 oil ratio scares him.Has anyone ever had a problem running a yamaha at 100:1?
I will be doing mostly wot[70%],maybe [10%] idleing and [10%]slow speed.I know the biggest thing i have heard is if you go wot you need to really run all motors at 50:1 to make sure it gets proper lubrication.I know yamaha would change the oil ratio if it were a problem but it seems most people i talk to run their motors at 50:1 so maybe thats why they never have any problems.What is really odd is the breakin ratio is 25:1 on the yamaha then run it at 100:1 after the 10hrs.It's usually half on the breakin.On mercs or any other 2stroke motor i have ran it's usually 25:1 on the breakin and then 50:1 after the breakin.Does anyone run their yamahas on 100:1?If yes any problems at all?Also how long have you ran it on the 100:1 oil ratio?
I don't want to blow this motor up so any imput would be helpful on this ,thanks
I will be doing mostly wot[70%],maybe [10%] idleing and [10%]slow speed.I know the biggest thing i have heard is if you go wot you need to really run all motors at 50:1 to make sure it gets proper lubrication.I know yamaha would change the oil ratio if it were a problem but it seems most people i talk to run their motors at 50:1 so maybe thats why they never have any problems.What is really odd is the breakin ratio is 25:1 on the yamaha then run it at 100:1 after the 10hrs.It's usually half on the breakin.On mercs or any other 2stroke motor i have ran it's usually 25:1 on the breakin and then 50:1 after the breakin.Does anyone run their yamahas on 100:1?If yes any problems at all?Also how long have you ran it on the 100:1 oil ratio?
I don't want to blow this motor up so any imput would be helpful on this ,thanks