Flow from tell tale at start up?

[250Gimp]

Hi there

I did a search on this, but can't find any specific info, so here is my questions.

How soon should I get water flow from the telltale at start up?

There seems to be a bit of a delay that I don't remember it having.

When I start the engine in the water the water doesn't start to flow until I rev up the engine slightly. (No tach, but guess 100-200 rpm increase) Once it starts flowing it flows perfectly.

I figure it will be time for a new impeller soon, but I am hoping to make it until the fall.

I would apreciate any thoughts on this from the local experts.

By the way it is a 1999 75hp Force.

Thanks

 

[250Gimp]

Re: Flow from tell tale at start up?

Anyone???? I don't want to fry anything this weekend!!!

 

[Dave K.]

Re: Flow from tell tale at start up?

i have a '84 so it's possible the lowers are different, more than likely they are now that i think about it. yours was made by mercury, mine is strictly chrysler.

My Thoughts: i change the impeller every two years. the telltale would be for high speed/ rpm's as the exhaust ports on mine are used for low speed. it does take a few seconds for the water to go thru the block & out the ports at low speed/idle from the impeller. remember the impeller is used for lower rpm's. the point is that the telltale would be noticable once the motor is reving at high speed or probably above 1500rpm's & maybe less or say around 8 or 900 rpm's, that's where the telltale is used. otherwise the water comes back out thru the prop. well it does anyway but you can't see it.

 

[250Gimp]

Re: Flow from tell tale at start up?

Thanks for the reply Dave

My concern comes in that the telltale used to start flowinf slightly earlier than it does now.

I guess I can just keep an eye on it....but I am looking for some assurance that I won't overheat.

To me I shouldn't because once the rpm comes up a touch the water flows, but I am new to boat motors so want to confirm

Thanks