no water out teltale

[98merc150efi]

just purchased a 98 merc 150efi and hooked it up to hose with muffs and started engine and ran for 15 seconds and no water out the teltale- should water come out rigt away or does it take a while ? person i bought motor from said water pump was replaced last year

 

[tramp666]

Re: no water out teltale

LU needs to come off if you haven't had it off yet. Impeller needs to be changed/checked every year. Plus it's good to know how to do it.(takes about an hour) and use lots of grease putting it back together so it will come back off next year. Impeller is about 25-30 bucks.

 

[AMD Rules]

Re: no water out teltale

You may not see water out the telltale until the thermostat opens.

 

[Texasmark]

Re: no water out teltale

Pop the cowling (hood, cover). Standing at the rear of the engine you should have a couple of 3/8" hoses routed around. (This is from a '95 150 but I'd bet yours is real close).

At the center top of the block, right aft of the flywheel is one outlet. This cools the exhaust manifold and is not in the stat loop. The hose goes from the top of the engine and is plugged into the housing just below the block.

This line may contain the pee tee. If so, the block has to fill with water before you get water out the hose hence pee. This could take a minute or two depending on several things.

The stats should be bulges (caps) at the top of each bank of cylinders held in place with 2 screws each, with a hose attached (stats are under the covers; one in each head). They probably are linked together (jumper hose)and then one hose goes below for discharge.

This is the stat output and doesn't have water in it till a stat reaches 143F on son's engine. Long wait.

Son's engine was originally plumbed to the stat line but we didn't want to wait that long for water (besides over temp has a warning buzzer) so we changed the pee outlet to the first line I mentioned. Now we only have to wait for the block to fill to get a stream.

Mark

 

[NGABaldEagle]

Re: no water out teltale

I couldnt get mine to pee either.
Replaced the impeller (dont forget to vaseline the inside of the upper impeller housing) and fired that baby up.

Started peeing water and about 85 large red ants.
I havent looked back.
Its easy..Get a book.

 

[studlymandingo]

Re: no water out teltale

Started peeing water and about 85 large red ants.

I checked through my manual, and couldn't find anything about peeing red ants!​

 

[NGABaldEagle]

Re: no water out teltale

I concur with your observation sir.

There is nothing in the book about peeing red ants.

I wouldnt sweat it too much if your motor was to pee red ants.
The stream is too powerful for them to fight it.
They will come out eventually.

That was the weirdest thing I have ever seen happen to an outboard except for the time our rude 25 came off at WOT in Jimmy's hand.