I have recently had a Yanmar gearbox seize after only 360 hours of light use but a few months out of warranty, 24 months or 2000 hours. Yanmar did not want to know about it initially even though no external cause could be found, it appears to have suffered an internal failure caused by a gear seizing on a shaft although the correct amount of Yanmar oil was in the gearbox. After I contacted the Australian Distributor, Power Equipment, they eventually agreed to send gearbox back to Japan for assessment but warned me that since the Global Financial Crisis Yanmar have become difficult and they would most likely still claim it is out of warranty regardless of the cause and it would take at least 6 months to get an answer. Australian consumer laws provide for an implied warranty which states basically goods must be fit for their purpose and provide adequate service which could reasonably expected regardless of time frames in a manufacturers voluntary warranty. Effectively in Australia time limits on warranty are not enforceable. Eventually Yanmar agreed to have gearbox sent to Japan and agreed to refund costs if the gearbox had failed internally. I agreed to this, even though it would appear the failure is obvious and I wonder why the Australian distributor could not inspect and advise Yanmar. Without advise to me, Yanmar have now withdrawn their "offer", a fact I learnt when I spoke with the service agent who told me Power Equipment had told him not to send the gearbox as they had now withdrawn the offer, he thought I had been advised of this. I have emailed Yanmar customer service twice without any response what so ever. Has anyone else had similar problems with a Yanmar gearbox or similar problems with Yanmar or Power Equipment in Australia? Another post regarding Yanmar 440 engines seems to indicate similar issues with Yanmar?