Have a 40 year old Yanmar 2QM15. Sometime in the past a P.O. converted this salt water cooled engine to fresh water with the addition of a second pump and a heat exchanger in a kit sold by Sendur. I now have two largely inaccessible water pumps belt driven on my engine. I change the impellers every two years despite the accessibility issue. Problems this year are as follows:
1. Cannot find gaskets for added pump. Exact same size as original pump with different hole pattern.
2. This year found both impellers damaged after two seasons use. One was missing a fin and both had torn cracked fins.
3. Purchased an impeller kit from Jabsco that was listed for the original pump. The provided gasket was clearly not for this pump. Every dimension was off.
4. The new
Jabsco impeller was correct in all critical dimensions but the fin thickness was greater than the original. Use or not?
5. As an experiment two years ago tried using a Nitrile impeller for salt water pump and continued using Neoprene for coolant pump. As stated above both impellers were damaged.
Anyway, now what? Is two year 200 total engine hours too much to expect? Never had failures this soon. Has Jabsco given up on quality control? Are the new thicker fins a design improvement or a defect? Use or not use?
1. Cannot find gaskets for added pump. Exact same size as original pump with different hole pattern.
2. This year found both impellers damaged after two seasons use. One was missing a fin and both had torn cracked fins.
3. Purchased an impeller kit from Jabsco that was listed for the original pump. The provided gasket was clearly not for this pump. Every dimension was off.
4. The new
5. As an experiment two years ago tried using a Nitrile impeller for salt water pump and continued using Neoprene for coolant pump. As stated above both impellers were damaged.
Anyway, now what? Is two year 200 total engine hours too much to expect? Never had failures this soon. Has Jabsco given up on quality control? Are the new thicker fins a design improvement or a defect? Use or not use?