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Panda Cub
10-12-2011, 12:05 AM
Here's my question, I have a 351W with smokey white exhaust. Here's the stats: no water in the oil, good oil pressure (roughly 40), runs at a good temp (160-170), and healthy compression (149-151). Could this be a cracked head? I didn't think it was if there is no water in the oil. Also this boat is smokey on clinton lake, the world's largest hot tub.

mikeg205
10-12-2011, 12:07 AM
any blow by or smoke from your dipstick well or valve covers?

Panda Cub
10-12-2011, 12:10 AM
negative. nothing, I am baffled right now

JimN
10-12-2011, 12:14 AM
Is it smoke, or steam? What does it smell like? If it smells like oil, it should be light blue. If it's steam and the cloud is very dense, it could be a bad head/intake gasket, cracked head/block or intake manifold. Could be a cracked exhaust manifold or leaking riser gasket, too.

mikeg205
10-12-2011, 12:14 AM
could be just steam...on that warm water... performance still ok? maybe head over to liquid edge to get a computer readout...

Panda Cub
10-12-2011, 12:22 AM
smells like exhaust, like it's running rich. And I always thought if an engine was running rich, the smoke was black. I believe it's smoke and not steam, or maybe a combination of both because of the water temp. performance is great.

JimN
10-12-2011, 12:53 AM
smells like exhaust, like it's running rich. And I always thought if an engine was running rich, the smoke was black. I believe it's smoke and not steam, or maybe a combination of both because of the water temp. performance is great.

Check your thermostat to make sure it's not stuck open. If it's too cool, the smoke will often be white.

east tx skier
10-12-2011, 11:43 AM
Have you been treating your gas with fuel stabilizer? That stuff will throw some white smoke.

carracer
10-12-2011, 09:35 PM
what does the burn on the spark plugs look like?

riggsy3
11-12-2011, 05:52 PM
you are right on about the fuel stabilizer making smoke east tx skier