5.7 EFI engine problems!

[txsantiago4]

Hey guys! Wanted to get your opinions on what may be wrong with the engine on my 1997 210BR.

Boat is in a freshwater wetslip and we headed out last Sat. I noticed right away that rpms were a little higher than normal (going 25 mph at 4000 rpm). Cruised about 15 min and started hearing a rattling in the engine compartment so we slowed down to idle and noticed a little white smoke coming from the hatch. We headed back to the dock and as we got there, the rpms and speed started to drop and eventually the engine died. :smt013

Thank God we were back at the dock and could pull the boat back in. Engine would not start back up. Checked prop and it was tight but noticed a lot of algae growth under the boat. We have a mechanic at the dock that will look at it but will take 3 weeks! Any ideas as to what the problem may be? :huh:

Thanks!

 

[BarryCF]

Temperature and oil pressure at the time?

 

[fc3]

Have you consulted a mechanic?

 

[txsantiago4]

temp around 170and oil press normal. mechanic is going to look at it in a couple of weeks.

 

[flflatrate]

white smoke?? are you sure it didn't overheat? you might of ran it till it got so hot and locked the motor up. When it wouldn't start, did it crank over?

 

[capz]

Bad piston rings? Pull the plugs. If any are oily, black/wet you probably have bad rings. Compare them to the pictures in the link for a more thorough inspection. Man two weeks to get a mechanic? Have you looked for a mobile marine mechanic. Check craigslist.

http://www.classictruckshop.com/clubs/earlyburbs/projects/spark/plugs.htm

 

[txsantiago4]

flatrate,

Engie wouldnt crank - just clicked. Would overheating result in rpms dropping and then the engine dying?

 

[Lazy Daze]

Uh-oh. I hope for your sake there's a simple answer... 'cause you don't want to hear my guess.:smt089

 

[SCORPIO]

Sounds like you may have cooked the engine. It may have been steam you were seeing not smoke. That could have been a sign of bad rises. The fact that it won't turn over sounds like the engine may be either seized or hydrolocked. Did you check the oil? Is it milky? If so change it NOW. If you're capable, pull the plugs and try cranking the engine and see if any water comes out the plug holes.
The low speed vs high rpms sounds like a prop slipping or a bad coupler.