Bugger Bugman...thats not good. Are the motors fed from different tanks, or is it the one fuel tank for both? 2 different water seperators? How old was the fuel? Tanks checked for contamination etc?
Cheers
Bugger Bugman...thats not good. Are the motors fed from different tanks, or is it the one fuel tank for both? 2 different water seperators? How old was the fuel? Tanks checked for contamination etc?
Cheers
Boat: Seafarer Vagabond
Live: Great South East....love Moreton Bay fishing
Today I found out a little more about the oil pick up in the sump of the Yamaha F60-50.......
Apparently the Pick up tube has broken off a few up here in Darwin which has caused them to starve of oil and seize,,,,,,,,,they (Yamaha) guys said their take on it was boats that had been towed on rough dirt roads that the Pick up line was vibrating and snapped off.........Also there is a new Yamaha part to replace this said old pickup tube with that has extra bracing to stop it from vibrating and cracking...
Sounds to me that this is more than just a "few" outboards that have had the same issue for Yamaha to make a replacement part to rectify the issue.
Can't see them revising the Oil Pick up just for a couple of boats up here in Darwin.....has to be a fairly common problem I'd have thought.
Dan
Confidence.......the feeling you get before you fully understand the situation.
I'll throw a dumb suggestion in- wrong grade or type of oil and or oil being washed out /diluted with fuel contamination so it may not be a cooling issue rather a heat generation and lubrication / supply and oil pressure issue. Oil pumps designed for specific grades of oil can Pull down of motor should help in diagnosis and determine if it is one pot or all that has suffered a failure and if it is oil supply or temp related. . Fuel restrictions should not hurt a 4 stroke like they do in a 2 stroke as oil is always getting to bearings and bore however they can cause very high combustion chamber temps etc.
Some hull and motor combinations have overheating issues with airated water with motors mounted very high like in ski racing where they use external or modified water pickups so that may be another are to look at. Airated water won't cool as well especially if there is any issues with water pump and connection to block with corroded tubes , leaking rubber seal etc and may not set of temp sender same as a car sender unit won't trigger with a empty radiator but a block metal temp sender if they have them as a secondary should have given a warning but often that will be too late and damage done. .
Be very interested to see what the mechanic finds and what he thinks is the cause.
Edit - Just read dans post above and it makes sense . Revised parts are often newer model parts that are retrofittable to prior models but yeah they don't change design for no reason and may have found a fatigue issue in long term testing or return diagnosis of failed motors . Love to hear what yamaha have to say and would photograph , get it looked at by a metal specialist , send it to them as such a part should last full life of motor not just low hours but doesn't explain previous failure of motor on that boat but that may be coincidence .
There has been a few different motors had oil pickup/pump problems, it is just a legacy of redesigned parts to adapt a car engine to work on its end, but this being Yamaha it is near impossible to accept failure, had it have been another brand (I didn't say e-tec) this would have been 10 pages long and everyone would be saying, "told you so" "my mate had one that..." mechanical things break, scrap it, fix it, or get it fixed inder warranty if applicable, and move on.
Considering doing the up-graded pick up on my little F50.......never pulled a powerhead off myself but how hard can it be?........I have a good set of quality tool's.....Torque wrench etc for re-setting things........Just really don't want to play with something in such a pristine condition tell the truth........Done a couple of Landcruiser/Hilux gearboxes and a lot of other reasonably in depth mechanical type things......How complex can this be I wonder and am I just being paranoid.........lot's of these engines around and with seemingly little failures of this type.........I might just be worried about sweet fa......How do you know?
Dan
Dan
Confidence.......the feeling you get before you fully understand the situation.
That's the problem, you don't know, and an oil supply problem will probably be terminal, there is a revised part, so it's a known problem, but not widespread enough to warrant a recall, if I had one, and it was well out of warranty, and I was mechanically minded and if I planned on keeping the motor for a long time, I would replace it, just to be sure.
Why would there not be a oil pressure alarm on all medium size and up motors? Why wouldn't it alarm, go to safe mode or cut out to stop failure?
a broken pipe would not " repair" after turning motor on and off. Oil sludging blocking a pickup and then clearing might do such a thing?
Steve,Originally Posted by stevej
Yes it's the same mechanic that has been looking over the F60 for 6 years and the 2x150s for 4. He's not a bad fella and seems to know what he's doing:-)
Now your pushing my memory but we did a re-prop about 2 years ago. Managed to get them up to around 51-5200. They were 4800 before that.
Scotty - both motors are fed from different tanks with their own water separator. The fuel does sit from time to time with no use but for that trip there was 760l of new fuel on board. It was 98 octane. I only use 98 unless it's unavailable where I'll use 95. 91 has never been it in to my knowledge.
Haven't actually touched the cat yet - both myself and the mechanic are a touch busy and we're waiting for bit more time to delve right into the diagnosis
Dan that's an interesting fact. The boat has done it's fare share of distance travel on the trailer. It's been up and back to Tassie a couple of times plus around Queensland. I've always rated the F60 set-up as one of the best I've owned - right up until the other day.
Mate I can't vouch for the oil pressure alarm but it certainly had a temp alarm. It went off once when someone might have left the muffs on when it was launched. That was quite a few years ago and I hadn't had any problems since then.
Brett
Yes it's a worrying fact also.........I only found out by running into the guy that owns my old boat fitted with a F60 2008 model.......When I told me what had happened my jaw dropped........I also highly rated that set up with the Yamaha so much I bought another almost identical....
I hope your mechanic can fill us all on in the details after he finds out what was the cause of your failure.
Cheers Dan
Confidence.......the feeling you get before you fully understand the situation.
All of Bretts engines are running FCW 10w-30 the recommended oil by Yamaha. I know because I service them!
Garry
Retired Honda Master Tech
What's Honda's recommend oil Gary - I might need to know that :-)
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