My 1972 12kw Onan tends to smoke on initial start. Why? After a minute or two it clears up and is perfect. Sometimes during the initial start it "misses". After all the following work, its a lot better, but we never did isolate a cause. Over three years the head and valves were redone, injectors rebuilt and double checked the following year, hi pressure fuel pump was removed and tested ok, new thermostats and temperature guage added, compression checked, filters changed and I replaced one faulty cyclinder glow plug. By pre heating for 40 or 45 seconds instead of the recommended 30 seconds, it usually starts reasonably, but every so often smokes a lot, although briefly. Any Onan owners who have solved this? Suggestions? Rob Brueckner 1972 Hatteras Yachtfisherman LAZY DAYS

Yup, don't look at the exhaust until it's been running for a minute or

> By pre heating for 40 or 45 seconds instead of the recommended 30 seconds, it > usually starts reasonably, but every so often smokes a lot, although briefly. > Any Onan owners who have solved this? Suggestions? Yup, don't look at the exhaust until it's been running for a minute or two. It's fine. Walt Konieczko Annie Sez Too 34 Maine Trader Lanoka Harbor, NJ with an early 70's 7.5kW Onan MDJE (not sure of the year, I bought it used)

GYMKIDD319@aol.com wrote: > My 1972 12kw Onan tends to smoke on initial start. Why? I have two 25 YO 15kw ONANS. They will not die! Initial smoking is probably from malfunctioning glo plug(s). The smoke is from too much unburned fuel at startup which glo plugs help minimize. So, logically, you have not problem after she warms up. Bob ________________ R C Smith Jr M/V MARY KATHRYN Hatteras 58 LRC Currently lying Annapolis