mercruiser 5.7 1996 alpha one

[mike111]

mercruiser 5.7 1996 alpha one dnt start

please help me.... wen i put my boat on lake and start the engine its start very good but if y run nit like 30-45 minutes then stop the engine like 5 minutes its start very good but if i stop the engine like 20 minutes the engine dint start , i change the oil - oil filter - spark plugs - wires-distributor cap-coil kit but nothing change , still have the same problem :huh:, please help me with this problem , thank you ............

 

[mike111]

please help ..............

 

[capecodcruiser]

Start with a dictionary and diction classes...than we might understand what you are asking for.

 

[Sundancer]

It's a CROWNLINE!!! There's your problem!! Sunds more lyk a ful/karrb is sue to y, but y dont no ANYTHING about Crown lines! :grin:


If you have a crownline, don't wear the crown as long?

 

[mike111]

thank you SUNDANCER , i try to open the carburetor and rebild-it thanks................

 

[SCORPIO]

Sounds like it could be a vapor lock, which is fuel boiling in the fuel line. Will the boat start if you let it cool for say a few hours? See if the fuel line from the pump to the carb runs very close to the engine anywhere. If so, see if you can space it further away from the engine.

 

[mike111]

yes the boat start very well if i let it a few hours to cool , i try to space it further away from the engine ,, it is very close to the engine ,, thank you scorpio............

 

[mike111]

???

 

[rkeats]

It is vapor lock, I had the same boat and engine. When you stop, you need to let the engine cool off a bit, leave the blower running for 5-10 minutes, open the engine cover. You can also keep a rag and pack some ice in it and put it on the fuel pump to cool it off. I started putting ethanol treatment in my boat and the issue went away. I used STA-BIL Ethanol Treatment.

 

[mike111]

the exhaust manifolds its over heating the engine compartment , the water pump its new and the thermostat mi concern its the thermostat aim not sure Watt its the temp for the thermostat 160 degrees or 140 degrees i install 160 because the old one it was 160 but the Gui's from west Marin tell me this engine carry 160 but for the book cold be 140 degree , cold be the thermostat the problem ????????????????????

 

[mike111]

??????????????????????????

 

[mike111]

please help mee.............................

 

[SCORPIO]

If its raw water cooled a 140 will work fine. If your exhaust manifolds are overheating, you may need to replace them if they are getting blocked by scale. You may be able to have a radiator shop clean them if they are blocked.

 

[mike111]

If its raw water cooled a 140 will work fine. If your exhaust manifolds are overheating, you may need to replace them if they are getting blocked by scale. You may be able to have a radiator shop clean them if they are blocked.

thanks....