rabijunco3
Cadet
- Joined
- Aug 29, 2003
- Messages
- 19
Honeymoon lasted 56 hrs. Engine bought new in 7/02. Blew 8/15/03. Chevron with Techron 92 octane fuel only, Pennzoil Synthetic TCW-3 since 2nd. reservoir fill. Never abused. Run in LA marshes. 20 hr. checkup done at dealer as prescribed, all OK though dealer did not have the computer to read codes. When it went bad, it first lost power then the "noise" started, clanging-like. Would still run, not to plane, idled rough.Taken to a second mechanic when the first one treated me like a birdbrain, implying that the problem was the higher octane fuel and the Pennzoil and that I had only spent .6 hrs of 56 at 5000 or higher only and the motor "needed" to be run hard. I cruise at 3800 to 4500 RPM, weather permitting. Design calls for 2 cylinders to shut off at idle. At first, mechanic thought that was the problem then Yamaha tech support it was OK.. Then, when could not find anything wrong with codes, temp specs, complete checkup by computer of TPS, O2 sensor, etc., they sent a TPS, did not help. Cleaning O2 sensor did not help. Went to the tried and proven "read your plugs" and saw the metal flakes in the plug for the right top cylinder. Removing the head showed the top of the piston had donated metal to the environment and you can see the top ring for 180 degrees of the circumference of the piston, where the metal is gone. Compression tested good prior to this being found (looked at plugs after test). Looking on the net for similar problems, it looks like this is a VERY COMMON FAILURE. Just go to google and enter yamaha powerhead failure and read the horror stories. Some people on their 3rd. powerhead in 3 yrs.!! So far, Yamaha has agreed to send a powerhead and the injector for that cylinder, after all, it is under warranty, but the cost is going to be about $3400 for powerhead and $1200 for labor, the day I have to foot the bill. A 3 yr. extended warranty costs approx. $1700, cheap if this is to be expected to happen again.<br /><br />Now to the true problem. If Yamaha knows this IS A PROBLEM, what are they waiting for to recognize it and offer a true fix? Recall? Lemon Law? The American way of dealing with things = SUE, might be the only answer? Yamaha owners, unite. This motor costs $12000 to replace. The japanese were able to figure out how to build wankel engines seals that lasted over 120000 miles, they should be able to figure this one out. Any comments?? Thank God dove and teal season open soon to get my mind off the boat for now.