Cold start smoking
Printed From: CorrectCraftFan.com
Category: Repairs and Maintenance
Forum Name: Engine Repair
Forum Discription: Engine problems and solutions
URL: http://www.CorrectCraftFan.com/forum/forum_posts.asp?TID=821
Printed Date: May-16-2024 at 5:27am
Topic: Cold start smoking
Posted By: Guests
Subject: Cold start smoking
Date Posted: September-14-2004 at 12:17am
Have 1995 SNOB with Pleasure Craft Marine
351 240 hp carb
450 hours
Oil changes at 50 hrs
New cap rotor this year
Starts right up runs a little rough.
Blows white/bluish smoke briefly than smooths out
...Seems like it smokes longer when the boat sits a week or so
Otherwise running/pulling great
My problem is ???
Anyone have any ideas??
Thanks
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Replies:
Posted By: Guests
Date Posted: September-14-2004 at 10:10am
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Rotate the electric choke to give the spring less preload... its marked "leaner" with an arrow.
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Posted By: jameski
Date Posted: September-14-2004 at 11:43am
White/blue smoke is oil burning - not rich fuel mixture (that would be black smoke) - you shouldn't need to lean your electric choke. You have bad valve seals and/or guides. You can continue to operate this way for a LONG TIME without any problems (exept for the annoyance of the smoke).
If you really want to fix the problem, rebuild your cylinder heads. You might try replacing just the valve seals without pulling the heads - but don't attempt it if you don't know what you're doing (you could drop a valve into the cylinder).
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current boat
http://www.correctcraftfan.com/diaries/details.asp?ID=1977 - 94 Sport Nautique
previous boat
http://www.correctcraftfan.com/diaries/details.asp?ID=601 - 78 Martinique
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Posted By: David F
Date Posted: September-14-2004 at 3:38pm
If you attempt to replace the valve seals, there are two ways to prevent the valves from dropping into the cylinder:
1: Remove the spark plug, bring the cylinder in question to TDC and then stuff the cylinder with a rope via the spark plug hole.
2: Best way. Buy a fitting that screws into the spark plug hole that allows you to connect your air hose from your air compressor. This will pressuriz the cylinder and keep the valve in place. It will also tell you if you have ring problems or other cylinder sealing problems...but you could figure this out with a simple compression test.
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