1999 15hp Honda weak telltale

[Scousedeli]

Hi All, I have just been given the use of a little valiant rib with a Honda 4 stroke outboard with a telltale issue. A dribble at low revs, disappears with higher revs. I have already changed the impeller and cleaned out the intake. Any other suggestions on where to look?

Cheers

Lee

[A1an]

Have you been running this in a tank or on muffs?

These engines don't like the muffs, I've two of them and they never pump right unless in a deep tank. The tell tale could almost drill glass it's that strong.

[Scousedeli]

Hi Alan, in the lake, not on muffs.

I'm tying to avoid a more involved stipdown of the engine!

Cheers Lee

[Fenlander]

You mention checking the intake but what about the outlet? Quite common for that to be partially blocked with salt or even a little bit of impellor rubber.

[jeffstevens763@g]

you say changed the impeller what was its condition did you change the pump body [badly scored] is it in the right direction ie on a Suzuki you turn the shaft clockwise so the vanes are running in the right direction [trailing] is the water tube fitting snug up in the power-head [not loosing pressure] did you back rinse/blow out from the tell tail before fitting the lower leg back on.
to be honest i have seen this on a few engines dribbling at tick over and pumping well at revs.
might be teaching you to suck eggs
cheers

[Scousedeli]

Cheers Jeff,

Not checked all those ideas out yet, will do tomorrow. What's the best way to back flush the system?

Cheers

Lee

[jeffstevens763@g]

Originally Posted by Scousedeli

Cheers Jeff,

Not checked all those ideas out yet, will do tomorrow. What's the best way to back flush the system?

Cheers

Lee

you really need the leg off lee, but an air line or hose from each side my tell tail has an insert if you take that out if it has one you find the hole much bigger to get the hose up you might find debris behind that, if you dont know the history of the engine it might have had a impeller disintegrate at some point leaving bits in the water channels or might just be salt dislodging blocking the tell tail, salt away is good for that run engine in a tub with it added after you give it a good clean out.
you tube has some good videos on for different engines fitting water pumps one is D-rays shop outboard motors.

cheers

[Fstarocka]

On my motor the tell tale is only connected to the head by a rubber hose.. I've had sand literally stuck just in the tell tale rubber tip.. You can also possibly see a similar hose enter the bottom of the power head.. U can disconnect this hose and connect garden hose to the tell tale tube, flush the water from top to bottom of head. If any muck comes out good for you.. It should flow strongly from tell tale back thru head..

You can also test impeller with the hose at bottom of head disconnected.. U shd see water coming thru after a few seconds.. If not ur impeller or water circuit in the lower unit is not functioning..

Reconnect hoses and check tell tale again..

Sent from my SM-G900M using Tapatalk

[Scousedeli]

Thanks all, for your suggestions.

It's running fine now, I ended up having to take the exhaust manifold off and having a good clean through with a variety of cable ties to remove loads of salt.

Cheers

Lee