Sendure Heat Exchanger for Onan Generator. used about 200 hours on Onan 8KW, diesel generator. Sendure #12189-1-7 (old Sendure part number is 4366-4-7) Cupro-Nickel, Cleaned and tested. List price is $448.00, will sell for $125.00 plus shipping. Ed Nolan 386-446-4242, cell 386-503-3231. efn1@cfl.rr.com