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Old 13 August 2017, 09:04   #1
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Problems with tell tale spout

Hi all,

I've got a 2002 hpdi 150 that I've just serviced. (Top end). She was working ok on muffs but I wanted to run her longer to test her up to temp.

I put the motor in a bongo, covered the inlet, but I've got no tell tale. The impeller was changed a couple of years ago and she's only done around 30 hours before I bought her.

Any ideas what it could be please??

I was originally thinking maybe salt crystals in the tell tale, but I'm more inclined to think it's the impeller or water pump as on a pressurized feed, such as on the muffs, it's fine, but when she try's to pick up for herself, no tell tale.

Does this sound about right??

If so do I just change the impeller or replace the whole water pump kit???

P.s. I was gonna keep her running with no tell tale just to see if the high temp alarm cuts in, but I'm worried if doing damage by running her in a bongo without a tell tale.


Thanks in Advance
Craig
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Old 13 August 2017, 09:11   #2
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No harm in changing the impeller. Drop the gear oil first. If it looks like mayo, then you have water ingress, so a water-pump kit and 'o' ring bearing seal would be the way to go. If it's okay, and there's no scoring on the stainless steel plate, you can probably leave. Also renew the fibre washers on the drain and fill screws.

No tell-tale - could be blocked outlet as suggested. You can run a length of strimmer nylon up it when it's running and that should work. Also check the thermostat. You'll need a new gasket. That's as good a check as any for salt crystal build up.
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Old 13 August 2017, 09:33   #3
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Thanks Spartacus, appreciated.

I suppose if at least I change the pump and impeller, it will save me a job next season and will give me a fresh start to move on with.

Thanks again
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Old 13 August 2017, 13:46   #4
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Just make sure you have a decent head of water above the inlet my Suzukis need quite a bit of water over and above the inlet
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Old 13 August 2017, 15:14   #5
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Brilliant, thank you
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Old 13 August 2017, 17:06   #6
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Originally Posted by jeffstevens763@g View Post
Just make sure you have a decent head of water above the inlet my Suzukis need quite a bit of water over and above the inlet
+1
I've had the same problem with a Suzuki. The pump seems to be mounted relatively high and the engine needs set quite deep in the test tank before it would prime.
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Old 14 August 2017, 01:35   #7
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The 150hpdi is a great engine but water peeing from the pee hole is not it's strong point when flushing from muffs. I had one and was told by yamaha that the engine should be flushed with cavitation plate completely submerged. I found that about an inch or 2 above was about right. The pump takes more than a hose can supply on muffs. There are a few other things to look out for. You should get water from the pee hole when flushing from the flushing attachment but it doesn't flush the whole engine. The regulator on these is water cooled and the pee hole is supplied via this. If the engine is not religiously flushed on the flush point then over time the regulator water channels can get blocked/restricted. I used to get a bit of strimmer cable and wiggle this up the pee hole whilst flushing to make sure this doesn't happen. It went in about 14inches or so before it bottoms out in the regulator. If you follow the small pipe from the pee hole you will see it goes up behind the fuse panel, that is where the regulator is positioned. From that you can work out how long your strimmer cable needs to be. (regulator is about 3 inches long so allow for this, the cable should go right into it but because of the design of the water channels it will not go right through it). From there there is the same size pipe as the pee pipe and you will find it goes from the regulator down the back of the engine below the ecm. This is where the poppet valve is located. The poppet valve is another item on these that can be problematic. They can get stuck leading to a weak or no pee. There a design update. They were originally a kind of shuttle slide valve inside a rubber bush tensioned by a spring on the poppet valve cover backplate. Over time the poppet valve can stick in this rubber bush due to salt/scale build up. The new poppet valve is a dome which pushes against this rubber bush and is therefore less likely to stick. Be warned, it is a fiddly job to do due to it's location but i did mine for peace of mind. On these no water from the pee does not mean the engine is not being completely cooled but it is reassuring to see water coming from that location! Normally takes a few minutes after start up to see water from the pee hole due to the volume of the engine water ways. Next up is the thermostats and powerhead water channels. Thermostats easy to check and once removed give a good indication of what the condition of the inside of the powerheads is likely to be. If looking grotty, then running in engine flushing solution for a while will help but you need a lot to fill a tank unless you have a club that has a tank set up. If you get a good pee on the move that is more important but all the other points mentioned will help. Other points to check are the rubber seal in the water pump cover, this can get dislocated during refitting if not careful and the small rubber hose on top of the water pump cover that connects to the cooling water pick up tube which can get split/worn out over time and lastly look for blockages in the water pick up tube (less likely but possible if the impeller has ever broken up) Good luck. (if you need the right size strimmer cable send me a pm, i have loads left over)
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Old 14 August 2017, 02:14   #8
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Great post Wellhouse - thanks.
Mine runs fine on muffs, but I have a good hose setup with 'stereo' muffs.
I get a bit twitchy if I don't see mine peeing within 20 secs. Not sure it's ever taken longer than that, generally much quicker. Agree that it need to be sat a bit deeper than you'd expect when in a tank.
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Old 14 August 2017, 16:14   #9
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Brilliant post Wellhouse. Thanks.

I had a fairly good tell tale on the stereo muffs so was slightly taken aback when I had nothing from the bongo

Water was turbulent so did consider it wasn't deep enough. Ordered a water pump kit and new thermostats just to be sure though and it will also means I'm starting from fresh. I've heard before that the poppet is a bit of a pig to get to, So I'll leave that till last

Gonna try the strimmer cable first.

Thanks again for your knowledge. Gratefullly appreciated
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Old 14 August 2017, 18:40   #10
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I only ever use muffs to flush and have never had any issues with them not pumping water through the tale pipe instantly ( Suzuki 4strokes included ) .

I was on a mates boat where we hit a muddy bottom that stopped the water pumping through the tell tale pipe but luckily the impellor was fine and a piece of thick 100lb mono fishing line poked down the tell tale cleared the blockage. I've since unblocked a few outboards at my local ramp using just heavy fishing line, hope yours is that simple.
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