Cold start smoking

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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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David F Members Profile Send Private Message Find Members Posts Add to Buddy List Platinum Member Joined: June-11-2004 Location: United States Status: Offline Points: 1770	Post Options Post Reply Quote David F Report Post Thanks(0) Quote Reply Topic: Cold start smoking 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.

jameski Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: May-18-2004 Location: United States Status: Offline Points: 368	Post Options Post Reply Quote jameski Report Post Thanks(0) Quote Reply 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).
	current boat 94 Sport Nautique previous boat 78 Martinique

GottaSki Members Profile Send Private Message Find Members Posts Add to Buddy List Guest	Post Options Post Reply Quote GottaSki Thanks(0) Quote Reply Posted: September-14-2004 at 10:10am
	Rotate the electric choke to give the spring less preload... its marked "leaner" with an arrow.

Jeff Pullan Members Profile Send Private Message Find Members Posts Add to Buddy List Guest	Post Options Post Reply Quote Jeff Pullan Thanks(0) Quote Reply 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

Cold start smoking

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