2005 Yamaha 250 four stroke water cooling question

fishlips

fishlips

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When the engine is running water comes out of the tell-tale normal and as expected. When I shutdown the engine and hook up a garden hose the flush connection, water does not come out of the tell-tale at all. It comes out of the lower unit ports just not the tell tale. I have dual outboards and the other engine discharges water out the tell-tale normally in both engine running and engine shutdown flush. I ran a piece of weed-wacker cord down the tell-tale as far as it could go ( the same distance it would go on the other outboard) and still no flow. I also noticed when flushing this engine the amount of water that flows out of the larger grate looking exit port is much more than the other engine that seems to to be flushing properly and the amount of time to drain the water out of the engine once shutting off the water supply much less. Looking for any suggestions.
 
I'm in the same boat... insert drumroll here... but yes, you likely don't have enough water pressure for the water to come out of the tell-tale with the quick connect and the engine being off, or even when you've got it on and with the ear muffs. Most guys seem to get the flushing bags and then start up their motors to flush out the salt, make sure they start, etc... and those are available just about everywhere. I typically just flush out my engine using the quick connect as well as the engine being OFF, and then also use the Salt Away adapter. I haven't had any issues going that route, knock on wood, or I believe you can even use the ear muffs but you likely won't get water coming out of the tell-tale with those either.

Amazon.com : DPB-3 Outboard Motor Flushing Bag : Sports & Outdoors

Amazon.com : DPB-3 Outboard Motor Flushing Bag : Sports & Outdoors
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I have dual outboards and one will flow out the tell-tale normally with the garden hose connected to the flush adapter. The other will not flow out of the tell-tale. It’s not a water pressure issue.
 
If I'm understanding correctly, water comes out of the tell-tales on both engines when in the water and operating normally, but not out of the one motor when it's hooked up to the garden hose?
 
Make up a y-hose for flushing - one side to rabbit ears and the other to the flush port. Snake out the tell-tale back into fuel cooler with 300 lb mono or string trimmer plastic.
 
fishlips said:
Yes
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If it's working just fine while in the water, not overheating and doesn't have any issues... I'd just run it as it is. As stated before, lots of guys can't get their outboards to pee out of the tell-tale with the hose or ear muffs alone hooked up to it.
 
Not apples to apples but my 2003 200hp ox66 would run hot anytime I flushed it,( hose or ear muffs)
Yamaha tech said to run two hoses, 1 to ear muffs and the other to the hose connection
(similar to Hookups Y but without the restriction of 1 hose) - no more problems.
Not enough pressure?
Hose too small?
Don't know, but it no longer runs hot and tell-tale has good pressure. I usually run it for 15 to 20 minutes.
 
Its not so much the pressure as it is the volume. Long hoses, small diameter hoses, and contracting, crinkle hoses) may not supply enough volume. One motor may be on the edge and other have a bit more wiggle room. Of course, one motor may have more salt buildup in the cooling chambers. In summary, it not a big deal but is does warrant watching. Low water flow at the telltale with normal flow at the prop and LU can also indicate a not completely closed poppet valve. If the valve does not closed completely, the motor may start to run hot at low speeds and even overheat but will run fine at higher revs.
 
Had the same issues last year, port engine did not pee from the garden hose. Drove me crazy for days. Clean water line, fuel cooler, rectifier, dropped the lower, new impeller and nothing! Someone from Hullthru fixed his by cutting the water line coming out bottom of the engine block and run the weed wacker line down to the block. I did it and victory!
 

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Through the flush port doesn't always provide enough water through the circuit to force water out of the per hole. In reality, a peeing is not necessary at all for a healthy engine.

It's hit or miss - some engines do, some don't, some do sometimes but not other times.

It's totally a non-issue as long as the engine is otherwise running healthy.
 
The starboard engine is peeing like a race horse so it wasn’t the water pressure, which why I determined to find the clogged. Anyway, it works like a champ for two years now. It’s time to chase another ghosts…..Combo trim switch replacement, the binnacle combo trim switch only lower one engine down, however, it will trim both engines up. The single trim switch for each engine works as it should.
 
Some boaters have cleaned the control trim switch and it resumed working. I am not sure if that is your issue since in the above case the switch acted up and would work some times if you played with it. In either case, checking the wiring to the control and wiggling things while you hold the switch down might help located a broken wire/corroded connection)If you take the switch out of the lever, it can be taken apart and cleaned up in some instances. Be careful with the routing of the wires, they can easily be pinched when reassembling
 
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vocz said:
The starboard engine is peeing like a race horse so it wasn’t the water pressure, which why I determined to find the clogged. Anyway, it works like a champ for two years now. It’s time to chase another ghosts
Click to expand...
I agree. That would be my thought process, as well. I've run into enough engines that don't pee (or pee well) on a hose but pee perfectly in the water to not worry about it. Even the same model/size engines exhibit different characteristics. But I also understand why you asked as it "just seems odd" :)
 
vocz said:
The starboard engine is peeing like a race horse so it wasn’t the water pressure, which why I determined to find the clogged. Anyway, it works like a champ for two years now. It’s time to chase another ghosts…..Combo trim switch replacement, the binnacle combo trim switch only lower one engine down, however, it will trim both engines up. The single trim switch for each engine works as it should.
Click to expand...
all else aside, did it occur to you that if there were blockages in the exhaust cooling plumbing, the telltale stream pressure would be higher. Not that I think that is going on here but the fact that the stream runs like a race horse could be a bad sign:)
 
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