Dougcole
Guru
After our trip last month from Carrabelle to Clearwater, I decided to change the coolant on our pretty new to us 2005 mainship. Twin Yanmar 4lha-stp. I noticed that the coolant in the stb motor was no longer pink but was clear/cloudy.
The boat had very low hours on her when we bought her, about 200, and I've seen evidence of very little routine maintenance, so I figured the coolant had never been changed and had gone bad. I replaced it with new elc coolant.
Last week after running from Clearwater to Sarasota I did an engine check and found salt water in the expansion tank.
When I pulled an end cap off of the HE water poured out. I tried pouring water into the day tank and it poured out as fast as I could pour it in. This was Friday afternoon first day of our delivery/cruise to Stuart.
Luckily Florida Marine Power (they are great) the local Yanmar service provider managed to get me a new HE in just a few hours. $1,500 later we were back in business.
John at Marine power said in 15 years he has never seen a Yanmar HE fail like that, that it was a bad part failure and a fluke in his opinion. Aren't I lucky?
All told, saltwater ran through or sat in the engine for about 6 days, best as I can figure. Should I be worried?
I am going to flush it a couple more times and replace the coolant now that the boat is in Stuart for a while.
Doug
The boat had very low hours on her when we bought her, about 200, and I've seen evidence of very little routine maintenance, so I figured the coolant had never been changed and had gone bad. I replaced it with new elc coolant.
Last week after running from Clearwater to Sarasota I did an engine check and found salt water in the expansion tank.
When I pulled an end cap off of the HE water poured out. I tried pouring water into the day tank and it poured out as fast as I could pour it in. This was Friday afternoon first day of our delivery/cruise to Stuart.
Luckily Florida Marine Power (they are great) the local Yanmar service provider managed to get me a new HE in just a few hours. $1,500 later we were back in business.
John at Marine power said in 15 years he has never seen a Yanmar HE fail like that, that it was a bad part failure and a fluke in his opinion. Aren't I lucky?
All told, saltwater ran through or sat in the engine for about 6 days, best as I can figure. Should I be worried?
I am going to flush it a couple more times and replace the coolant now that the boat is in Stuart for a while.
Doug