Help! Overheating 3.0, not impeller or circulation pump

[charliedaubitz1]

Think I figured it out, your talking about the newer single point drain system. It's mentioned in manual 26

While we don't know what year the OP's motor is, I don't think it's that new

hose #13 https://www.perfprotech.com/mercury-marine-parts-catalog/drain-system/assembly/16151/180?model=794

 

[alldodge]

Yes, single point drain

 

[charliedaubitz1]

Yes, single point drain

 

[Vetal]

OK now I understand My boat is 89'and engine MIGHT be 94', I don't have anything but ~1" hose going to manifold from th.housing
Anyway, I am still scratching my head, Why the f doesn't Searay 160 have overheat alarm????

 

[Scott Danforth]

Why the f doesn't Searay 160 have overheat alarm????

it has a gauge. you were taught to look at the gauges every 7-10 seconds when you got your drivers license.

 

[alldodge]

Could be it does but it might be damaged or disconnected. Found many that disconnected because they didn't want to hear when trying to start. It's behind the helm

 

[Scott06]

OK now I understand My boat is 89'and engine MIGHT be 94', I don't have anything but ~1" hose going to manifold from th.housing
Anyway, I am still scratching my head, Why the f doesn't Searay 160 have overheat alarm????

could be disconnected or non working at this point, or may not be installed. best to watch gauges frequently.

When you did the impeller did u use a OEM part of aftermarket? There is some real junk being sold out there by some folks. Imellers are a good place to stick with oem

 

[nola mike]

OK now I understand My boat is 89'and engine MIGHT be 94', I don't have anything but ~1" hose going to manifold from th.housing
Anyway, I am still scratching my head, Why the f doesn't Searay 160 have overheat alarm????

Older ones don't (listed in the manual as an option). My '86 didn't, the '89 parts boat I got didn't either.

 

[Vetal]

Could be it does but it might be damaged or disconnected. Found many that disconnected because they didn't want to hear when trying to start. It's behind the helm

How to check, if my boat has a buzzer?

 

[Vetal]

OK guys very interesting. Impeller was spinning on the shaft. That explains why SOMETIMES it poured some water, and why it took time to diagnose, because first 2 times I checked raw water hose, it DID have water flow in it crazy.
Impeller was Recmar. I don't know why it decided to start spinning on the shaft. So now I know that new impeller can also start spinning any time

 

[Vetal]

Also I researched a bit and created visual alarm of 5 red leds Will take a pic if anyone's interested

 

[alldodge]

How to check, if my boat has a buzzer?

It's about the size of a quarter and 3/4 inch thick behind the helm