2007-06-23 16:30:11 · 8 answers · asked by Anonymous in Cars & Transportation ➔ Boats & Boating
the engine had a catastrophic breakage
most likely the thermostat was stuck closed and when it did decide to open it sent much cooler water to the head the heat shock of the hot metal and the cold water shocked the head and the head cracked ,most likely it has an aluminum head it can be repaired by a good head repair shop bu iron head just get a new on the are more expensive to repair than to get replaced the head
2007-06-23 16:39:43 · answer #1 · answered by Dany W 1 · 0⤊ 0⤋
With inboard motors one of the biggest problems is the water cooled exhaust manifolds and exhaust risers. They corrode and shut off the water flow. If the water flow stops, cooling stops.
It could be any of the answers here. Without being able to check out the engine, it's hard to tell what the problem is.
2007-06-24 11:00:50 · answer #2 · answered by Anonymous · 0⤊ 0⤋
it could have been caused by a bad water pump impeller in the lower unit which allows cool water from the lake into the moter cooling system and someone was not watching the temp gage and let it get to hot
So if you get the head fix go on and change the impeller it does not cost much and will save you money in the long run
2007-06-23 23:46:57 · answer #3 · answered by kevin 2 · 0⤊ 0⤋
Yes running any motor to lean can cause it to overheat and seize up, or blow head gaskets. It is easy to tell by pulling the plugs. Another way to know is the fact that the motor has less power and overheats or runs hot. Time for an overhaul. Thats why boats have gauges and cars have lights. In your car you can walk for help. In your boat, well you can????
2007-06-24 00:23:03 · answer #4 · answered by Anonymous · 0⤊ 0⤋
Heat is the usual curlput. It could have been caused by improper cooling, or running the engine too lean. Either thing will build up heat in the heads, and can cause them to crack. good luck.
2007-06-23 23:35:07 · answer #5 · answered by Fordman 7 · 0⤊ 0⤋
now you're talking. that valve cover thing confused me. overheating. check the water pump...probably needs repair. check the thermo-stat...put it in a bucket of water with a thermometer and see if it opens at the correct temperature. most of the time a cracked head can be repaired. replacement is not overly expensive. plan on changing the riser gaskets too. boat..."bring on another thousand". not funny, huh?? p.s.-there are 2 water pumps...check them both.
2007-06-24 14:36:19 · answer #6 · answered by Anonymous · 0⤊ 0⤋
I have found debris to be one of the biggest culprits, leaves and sticks can be sucked in and reduce the volume needed to properly cool. Have your water pump or impeller checked while it is being serviced.
2007-06-23 23:51:00 · answer #7 · answered by usnavmag71 2 · 0⤊ 0⤋
Is it possible that the engine wasn't winterized correctly and froze over the winter??
2007-06-24 20:44:03 · answer #8 · answered by Jack S 1 · 0⤊ 0⤋