I think Greg said it well 00 Tracker Service Manual download. ..if no powerhead at 500 hours, then it is likely that engine will contiue to perform well. BTW, that can be quickly checked with a YDS data dump.and I would require seeing one of those if I were you. Tells you a LOT about the engine and how it was run.

In fact ANY used outboard should come with a dump of the ECM data before the sale..sorta like CARFAX on autos, but with more detail. download Audi Tt 2017 Workshop Manual. There have clearly been a higher than normal rate of problems with the 250 and 300's..and just as clearly there are a number of us with those engines that have had ZERO problems. Engines that have gone past a couple hundred hours without ANY issues or reapirs other than routine maintenance seem to never be an issue based on the THT threads.Lastly, look at getting extended warranty when you buy.sometimes you can get a deal on that as a motivator for the sale of the rig. I am also concerned about these motors as I shop for a used rig.

A local mechanic (who works on all brands), said he did not think there was anything wrong with these engines. He attributed the problem to new engines and poor setup by the dealer. He said they will sometimes fail to bleed all the air out of the oil lines, therefore causing the oil starvation problem. His opinion was that this has only happened on new engines, and if the engine has a little time on it, you should be in the clear. From reading THT threads, I believe Yamaha agrees with his opinion as to the cause of the problem.

Does anyone know about this happening on something other than new or nearly-new engines? Joe - 8/8/2005 2:07 PMAir in the lines?? That's not a closed system.ie there is an outlet to the oil pressure; the air would eventually get bled out. That's correct Joe, but in the initial startup, the effected cylinder(s) would run without any lubrication for the time it takes the air to bleed. download free 2015 Ford Taurus Manual. 2 stroke engines without any oil in the fuel mix have no other means for lube of the cylinder walls and rings. download free 2011 Polaris Ranger 500 Manual. That is what some decent mechanics believe happened to some of these engines..and likely has been a contributing factor in the failures of rebuilt engines.