Re: yamaha 115 four stoke
I have twin 2000 Yamaha F115's. They have not been without problems. Current total hours is about 500. I broke them in according to the manual instructions. First oil change by a dealer's service at 10 hours. Did a second oil change at about 50 hours only because I'm a maintenance nut. Third oil change at 100 and the port engine oil looked dull tan. Starboard was crystaline. Told the dealer I thought I had moisture in the crankcase so he told me to haul the boat to him (80 miles). Checked it out and they consulted Yamaha who said there is "no way" you can have water in the crankcase. $450 later, I left there thinking I was crazy. That was November at end of first season. The next year, 5 running hours later I look at the oil on the dip stick and its tipped with foam and looking tan. I called a different dealer who followed Yamaha's instruction and changed thermostat (condensation) not evaporating and told me its not seawater. To this dealer's service dept credit they knew something was wrong but all they could do is what Yamaha authorized under warranty. All factory reccomended tests showed no problems. All the while I'm using the boat because they said it was no problem. I'm changing oil less than ten hours, and in frequent contact with the a local dealer service. Then the dealer told me Yamaha told them they think they know the water source and parts are on order . They said use they engine until the parts come in and I can get in the schedule. <br /> I decided I was going to limit my use as I did all year until this was sorted out. (This problem started November 2000 and after the winter lay off boat went into use in May 2001, after which I imediately saw the problem again and its now August and I can't confidently use the engine.) Anyway pulled the dipstick after a days use that put about 3 hours on the motor and foam just poured out of the dipstick hole. I ran my new motor with a ton of seawater in the crankcase. Called the dealer and he said bring it right in. A week later, got it back repaired and was told water leaked around an oil pump gasket. I Flushed the crankcase with new oil three times before I used it and haven't seen anymore water since. <br />The issue is not with the second autorized Yamaha service dept, in fact they dogged this problem until Yamaha finally came up with something. I just spent 2000 last year to extend the warranty for another 3 years on the motors which I probably would not have done if I didn't have the problem. I asked the dealer (the one who's service dept finally fixed the problem) to tell Yamaha to extend the warranty for three years on the motor I had the water in and I'd buy the warranty extension on the other motor.
