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Cold start smoking |
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Jeff Pullan 
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 Topic: Cold start smokingPosted: September-14-2004 at 12:17am |
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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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GottaSki
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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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jameski
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Joined: May-18-2004 Location: United States Status: Offline Points: 368 |
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Posted: September-14-2004 at 11:43am |
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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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David F
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Joined: June-11-2004 Location: United States Status: Offline Points: 1770 |
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Posted: September-14-2004 at 3:38pm |
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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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