knock sensor

[kellertb]

i had a couple of readouts on the smartcraft that said knock sensor. the boatyard suggested that it was either old gas or a manifolds job was imminent. the boat spent its first 3 years in fresh water on lake mead. could it need manifolds replaced already.

 

[flarepoman]

Yes at least check the risers and the manifolds. I didn't and got water in the engine. As a mechanic I was able to save the engine. That took most of the summer on weekends.
I replaced mine with the aluminum ones as I come out of salt water into fresh.
I was told every 2 years. Learned my lesson quick

Rick

 

[kellertb]

how do you check the risers and the manifolds?

 

[flarepoman]

Pull off the riser and look in the holes.

 

[floriduramax1]

how do you check the risers and the manifolds?

Ditto!

 

[kellertb]

how much should it cost to have the manifolds and risers checked and how much to replace if needed? do you actually replace them or is it gasket replacement?

 

[kellertb]

i had the mechanic out and he thought the knock sensors on both engines went off due to old gas. this is most likely the case because i had 9 month old gas in the boat.

 

[kellertb]

no more knock sensor beeps today. it must have been old gas.