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Old 17 February 2016, 11:08   #11
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Originally Posted by Fstarocka View Post
curious why it wd be coming out at the base of the head section
The telltale does not exhaust all the water going through the head. Most of the water joins the exhaust gases and goes out through the prop (or wherever the exhaust goes on your motor.) The tell tale is like putting a small hole in your garden hose; it's there to tell you if you have pressure in the rest of the system or not. Unfortunately, the "not" part may be due to the telltale hose or nozzle being blocked, or a lack of pressure at the point the telltale is tapped into.

First thing I'd do is to stick a piece of wire or weed whacker line up the telltale to shift any blockage there. Second, I'd put a high pressure nozzle on a garden hose, and reverse flush through the telltale outlet (motor off.) If neither of those work, see if you can remove the telltale hose at the block and check for water there. If not, then I'd start in on the lower unit. Put a hose on the water line leaving the impeller and see if water circulates through the head. If it doesn't you have blockage within the water jacket. If it does, start looking at the impeller.

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Old 17 February 2016, 15:22   #12
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Originally Posted by jyasaki View Post

First thing I'd do is to stick a piece of wire or weed whacker line up the telltale to shift any blockage there.

jky
+1....
That'd scupper the "profits of doom" who'd have you pull the engine apart before you'd checked to see if if is could be sorted in two minutes with a bit of MIG wire.......
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Old 17 February 2016, 16:59   #13
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Lol ok will do.. But I don't see how it's leaking out bottom of the head unless a hose is kinked/split? Tx for the info.. Only be back at boat in a few days..

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Old 18 February 2016, 03:33   #14
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it was done by the PO who had it or a few yrs.. im sure they would have done it correctly.. the water was coming out at the top for about 3 minutes.. then it started dribbling (dirt?) and then started coming out the mount -

it seems like there must have been dirt in there cos it was working fine.. and the water was warm .. when i followed the tube up the motor it went ontop of the top cylinder on the head.. so it was circulating thru the head..

the motor has some rusted nuts so im quite sure its dirt / corrosion..

how to i flush this out?

with the water coming out between the head and stem sections it looks like a decent tear down?
well i would certainly strip down as above started dribbling dirt [heavy corrosion] if that's dislodged then more to follow depending on how bad it is it needs a good flush out running the engine whilst trying to clear through the tell tale could cause serious damage if it overheats, taking the lower leg off back flushing to get the crap out whilst checking the pump at the same time its not a major strip can be done in an hour,can you be 100% sure its all ok, i do a service once a year on my engines which includes an impeller in the service kit. OMO
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Old 18 February 2016, 07:55   #15
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Originally Posted by Fstarocka View Post
Lol ok will do.. But I don't see how it's leaking out bottom of the head unless a hose is kinked/split? Tx for the info.. Only be back at boat in a few days..

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Last time I saw this, it wasn't actually leaking from where the water was dripping. The water was just trickling over the outside of the engine from the tell-tale nozzle and dripping off elsewhere
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Old 22 February 2016, 06:46   #16
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Welcome to the Clamshell club!

As an '89 model you are likely (but no guarantee) to have the revised edition cooling - they removed the thermostat & Bypass valve because of possible overheating problems, so you basically get full flow through the whole head all the time. Makes the Idle rough as a badger's @rse, but keeps the engine happy when running.

The way to tell is if you look at your exhaust side (LH if looking towards the bow of the boat) you will see a big round bit o nthe casting (about 1" dia) on the exhaust cover about halfway up. If it has no hole, you have the new cooling system so a blockage there is less likely, if it has a small hole, you have the thermostat & valve, but order up a new exhaust cover gasket before you take the lid off as both the thermostat and poppet valve can block (one of the reasons I modified mine) Also check that hole - it is to refer the poppet valve to atmospheric pressure and if blocked with salt etc can casue problems Again a quick poke will clear it, but beware you have a rubber valve under there so don't poke it too hard or you'll rupture it!

Also probably worth making sure you have the latest version of the nozzle at the outlet - the newer ones have a smaller hole so more water goes through the engine! (a worn one will have the same effect) They are V cheap so probably wiorth replacing anyway to be sure.



I have a full set of pics of it in bits on the home PC from my rebuild. I'll dig the ones out of the top of the leg - there are (from memory) 2 gaskets to get through to get a leak there!



Other thing - are you testing on muffs or in the water? There are lots of places on the leg water squirts out of if on muffs - and some of it goes up!
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Old 22 February 2016, 07:47   #17
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Quote:
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Welcome to the Clamshell club!

As an '89 model you are likely (but no guarantee) to have the revised edition cooling - they removed the thermostat & Bypass valve because of possible overheating problems, so you basically get full flow through the whole head all the time. Makes the Idle rough as a badger's @rse, but keeps the engine happy when running.

The way to tell is if you look at your exhaust side (LH if looking towards the bow of the boat) you will see a big round bit o nthe casting (about 1" dia) on the exhaust cover about halfway up. If it has no hole, you have the new cooling system so a blockage there is less likely, if it has a small hole, you have the thermostat & valve, but order up a new exhaust cover gasket before you take the lid off as both the thermostat and poppet valve can block (one of the reasons I modified mine) Also check that hole - it is to refer the poppet valve to atmospheric pressure and if blocked with salt etc can casue problems Again a quick poke will clear it, but beware you have a rubber valve under there so don't poke it too hard or you'll rupture it!

Also probably worth making sure you have the latest version of the nozzle at the outlet - the newer ones have a smaller hole so more water goes through the engine! (a worn one will have the same effect) They are V cheap so probably wiorth replacing anyway to be sure.



I have a full set of pics of it in bits on the home PC from my rebuild. I'll dig the ones out of the top of the leg - there are (from memory) 2 gaskets to get through to get a leak there!



Other thing - are you testing on muffs or in the water? There are lots of places on the leg water squirts out of if on muffs - and some of it goes up!
Testing on muffs, will be at the motor in 2-3 days, had to come buy some parts.. Hoping I don't have to remove the head section, bolts look pretty rusty..

Will take off lower unit and check if that hole is there.. Someone suggested a water pressure gauge on it..

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Old 22 February 2016, 07:49   #18
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Also, I mixed 30ml to a 1.5 fuel bottle, but there's no smoke at all.. Literally not even a puff, I take it that's a good sign?

Was previously used by saf marine here in South Africa so probably took good care of it.. 50:1 mix right?

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Old 22 February 2016, 09:56   #19
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You might find this link of use. Click on Mercury, enter your motor details into the boxes on the next page & you'll get the parts catalogue with diagrams & part numbers.
Evinrude Parts - OMC - Mercury Outboard Parts - Mercruiser Parts - Yamaha Marine
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Old 22 February 2016, 11:01   #20
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Aye, head off isn't fun.....

The fact you got water out of it initially makes me think you proably have the pipe in the right place, but can't guarantee what may be stuck in the various passagways. Like I said, the cooling cover on the exhaust side also opens up a couple of places to poke / flush from.

That mix gives 50:1 to me. and yes, it's a 50:1 mix.

No smoke? I am a little surprised - most 2- strokes (especially premix ones!) will smoke when cold...... Mine usually triggers fog warnings! (slight exaggeration for comedy effect!)



Just to be clear - the hole I am talking about is not in the lower unit - it's on the side of the powerhead above the gear change slider. I'll try to post a pic with an arrow tonight)

If you can get onto a Merc / Mariner Microfiche, (edit - Paintman has posted a link while I've been typing)



To illustrate the lack of a thermostat etc in the newer engines:

Old version:
650 (3 CYL.) Mercury Outboard 9112989 THRU 9135824 EXHAUST AND MANIFOLD COVERS Diagram and Parts

New Version:
60 (3 CYL.) Mercury Outboard 9469200 THRU 9683054 Exhaust and Manifold Covers Diagram and Parts


Main difference is the lack of the Thermostat / poppet valve The hole you are looking for is tiny (like about 3mm dia) and is on item 1 of the new one & item 22 on the old one. (you can see the "round bit" on the LHS of the cover on the old pic - it's dead centre of that circular raised bit)
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