Test for water pump working

[fattso]

I have a Yamaha 115 HP V4 motor. It seems to be running hot. Water is coming out the small discharge hose but engine appears to be running hotter than it should be.

How can I check visually to see if water is circulating through the motor correctly?

I see a "plug" on top of both cylinder banks and am wondering if theses are water jacket holes? If they are and I remove them, will water spray out theses holes?

This is a V4 115 HP Model #115ETLJ, Code #6E5L

 

[matt2002]

Re: Test for water pump working

Any temp gauges ? How long can you hold your fingers on the exhaust jacket or head ?

 

[fattso]

Re: Test for water pump working

Any temp gauges ? How long can you hold your fingers on the exhaust jacket or head ?

Just a light and it must not work. I can hold my fingers on the head about 1 second.

 

[matt2002]

Re: Test for water pump working

I'd check the t stats first.They could be plugged up and/or not opening.

 

[fattso]

Re: Test for water pump working

Thanks Matt. What are "t stats"? Not too familiar with terms on outboard, but need to know what is wrong before getting someone to work on it.

 

[jevery]

Re: Test for water pump working

thermostats

 

[fattso]

Re: Test for water pump working

Thanks jevery.

Finally got the boat out of the water. Will start checking today for what might be the problem.

 

[birdbrain]

Re: Test for water pump working

What year is your engine? When does the problem occur... high speed vs. idol? Is the engine primarily used in Saltwater or freshwater? Why do you think it is running hot...what does the engine do to make you think it is running hot? Giving more info will allow the folks here to better diagnose the issue

 

[matt2002]

Re: Test for water pump working

That would be a 1986 model.Only being able to hold a finger on the head for 1 second sounds too hot.The general rule of thumb is 3 seconds , no pun intended.