I own a 2002 Yamaha F225 4-stroke. I bought the boat and motor used with 100 salt water hours in Florida in 2004. Since owning the boat I have short fresh water seasons in the North. In 2005 and 140 hrs I took the motor in for a recall on the throttle linkage and the shop said I needed a new impellor and housing. The old one had the plastic housing for the impellor partially melted which resulted in a partial blockage of the outflowing water from the pump. The dealer explained I may have been in heavy weeds or picked up a plastic bag over the intake and overheated the pump causing the damage.
I boated the Summer of 2006 without problems but would occasionally get an engine alarm at idle only torward the end of the Summer. The alarm would silence once the engine was restarted and up on plane. I took to the same dealer at 180 hrs and the he replaced both thermostats since I told him I had a new impellor. The alarm still sounded. He dropped the lower unit to find a partially melted water pump impellor housing which was partially blocking the water from exiting the pump. Same failure 40 hrs earlier! How much water starvation is required to melt the housing in this manner?
Any suggestions on the root cause would be greatly appreciated!!!!
I boated the Summer of 2006 without problems but would occasionally get an engine alarm at idle only torward the end of the Summer. The alarm would silence once the engine was restarted and up on plane. I took to the same dealer at 180 hrs and the he replaced both thermostats since I told him I had a new impellor. The alarm still sounded. He dropped the lower unit to find a partially melted water pump impellor housing which was partially blocking the water from exiting the pump. Same failure 40 hrs earlier! How much water starvation is required to melt the housing in this manner?
Any suggestions on the root cause would be greatly appreciated!!!!
