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Old 02-18-2022, 05:56 AM   #41
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Catalina Jack. I agree with you but with the constant brainwashing in the media by ECO warriors and the fact that many modern engines use computers to regulate fuel some folk panic at a wee puff of smoke.
Into gear, get the engine up to working temperature, and enjoy our time boating.
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Old 02-18-2022, 10:46 PM   #42
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Unfortunately, it's more then a puff of smoke and yes it does only last a a couple of minutes. It's just not neighborly to subject my pier mates to an unpleasant cloud of oily smoke.

Bruce


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Originally Posted by catalinajack View Post
Why, oh why would anyone care about a bit of smoke on the start-up oh Lehman engines? It goes away in just a minute or two. Is there ever an end to what minutia boaters will angst over? Start the engines, put it in gear and go boating.
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Old 02-18-2022, 10:53 PM   #43
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Irish Rambler,

Here's the response from Lancing Marine:

BLUE smoke on start-up is not endemic on 2725 Fords, more indicative of drain-down of oil from somewhere and the only source I can thing of is oil carry-over from the rockerbox ventilation.
To test this, you could take a family-sized Coke bottle and a length of hose, pushed on to the rocker cover in place of the vent valve and going half-way down in to the Coke bottle, to see just how much ids carried over and if this givees you a clean start-uup.



And the response from American Diesel:

If the smoke never really goes away and the engine seems to be running cooler (below 180 (F)) -
A) Have the injectors "pop" tested by a local fuel injection shop. Clean and/or rebuild if necessary.
B) If the engine temperature never "levels off" as any thermostat controlled engine would, your galley water heater may be connected to the engine in such a way to bypass the thermostat.
C) Engine never levels off and you can see water moving into the header tank immediately on start up, your engine may not have a thermostat installed.
D) Compression may be compromised due to excessive glazing of the cylinder walls (result of too much oil in crank, too heavy a prop load, operating hours greater than 15,000)

If the smoke is heavy on startup and is all by gone at operating temperature (182-185 (F)) - Likely an environmental issue and you might consider one of the following -
A) Use a space heater in close proximity to the engine block to warm the engine and imitate a warm engine restart.
B) Consider installing a block heater to warm the engine coolant.


Bruce
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Old 02-18-2022, 11:33 PM   #44
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Both of the approaches and responses are different and its left you in a bit of a quandary, personally I'd list them all, then start to go through the list meticulously one at a time, starting with the easiest ones first, record the results, then go on to the next one, until you eliminate the cause.
Whilst everyone can give you guidance based on experience, none, except yourself are actually on the spot so I guess you have your work cut out over the next couple of months solving the puzzle.
We would all be very interested if you could keep us informed as to your progress and results of each test.
Just a thought ? How old is the engine and when was the last injector pump overhaul ?
Some of the early Fords had a 'cold start' facility, could it possibly be activated on start up because that would give you black smoke for a minute or two.
Be meticulous, be patient and you'll crack the conundrum.
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