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Thread: A Bugg's tale of Yamahas and hand grenades

  1. #1

    A Bugg's tale of Yamahas and hand grenades: update !

    Hello,

    I want to start this thread by way of saying this is a tale of actual events without opinion or bias - I'll let others bring that to the debate.

    Boat:- Grady White Tigercat x26. Motors - 2x 150hp 2009 four stroke Yamahas

    During November we took the family to Northwest Island. We left from Gladstone for a 12 night trip camping on the Island. Day 4 during an overnighter east of Wilson Island (10kms east) the overheat alarms came on and shut the motors down whilst travelling between GPS points. Waited a few minutes and restarted - alarms came on again and shut both motors down. We drift fished for an hour and restarted motors - no alarm and both tell tails running fine. Headed for home at just planing speed when the starboard motor started making a noise then alarms sounded - followed by "bang - crunch" and both motors stopped. Starboard motor seized and wouldn't turn over - Port motor ran fine but with no gauges. It would seem the starboard motor was - incorrectly - wired to both gauges cause both to cut out during the alarm for the Starboard motor. Made it safely back home and found the Cat planes on one motor at about 12knots.
    During the course of the next 8 days, the motor eventually freed itself enough to turn over and fire and will idle with a extremely nasty knocking noise from up high in the crankcase. I've informed the trusty local mechanic and we're awaiting options for re-power once the new supermarket is completed in a couple of months.
    During investigation we found an interesting fact. The boat was fitted with new motors on the Sunshine Coast in 2009 - running serial numbers with counter rotating props. Port motor went "Bang" during first or second sea trial and was swapped out completely by Yamaha. It had under 10 hours on it. It would seem five years later it's partner motor went bang with 380 hours on it.

    Boat: 2007 5m Brooker Discoverer open dinghy. Motor 2007 F60 Yamaha 4 stroke.
    Over the weekend I had the tinny tied to the pontoon and the young fella had some friends around who wanted to go for a quick tube. Tied on the single tube and ran them around for a couple of hours. Not far from the house and near the local public ramp the revs die suddenly on the motor followed by a noticeable crunch and a large bang followed by silence. No alarms - tell tale was working fine 30mins before (can't be positive it was working at failure point because I wasn't looking at it). Motor completely seized - turn of key met with a click only. Prop will turn so it's not a gearbox issue but from up high in the crankcase. Tow back to ramp and back in the yard. Mechanic informed and laughs a lot and will look for a diagnosis in the near future. Motor has between 200-300 hours on it.

    Both motors serviced every year whether they do 100 hours or 10. Some years the boats don't do a lot. Up until this point I have had not one sign of trouble - never touched anything on any of the three Yamahas other than impellers etc at regular change.

    Adding to the irony is the Bayliner Capri wakeboat is currently in the backyard out of action because it's chewed out the spline on the prop. The only boat still going in the Bugg household is the 9 foot dinghy belonging to the young fella with a 4hp HONDA 4 stroke.

    It's fair to say I'm not having a good run at the moment but the coincidence of Yamaha detonations in my first hand experience (3 from 4 motors) is starting to get a bit annoying.

    Regards

    Brett

  2. #2

    Re: A Bugg's tale of Yamahas and hand grenades

    Strewth! That is a bad run.

  3. #3
    Ausfish Platinum Member bigjimg's Avatar
    Join Date
    Nov 2006
    Location
    Moorooka, Brisbane.

    Re: A Bugg's tale of Yamahas and hand grenades

    Whoa there Bugman, black cat issues here. That is some unfortunate coincidence. Really would like to here the prognosis once the mechanic gets his teeth into it.
    I am currently in the process of offloading 2x F30's from our work boats. Both engines at the 850-900hr mark and run at WOT everywhere because the manager at the time had no clue what to power the boats with. Not quite sure what brand we're going with but they will be 60Hp.
    Repowering while they are still running.

    Hope you find some answers and your luck turns around for the better. Jim.
    Last edited by bigjimg; 02-02-2015 at 08:42 PM. Reason: Usual sausage finger trick, re spelling.
    Haines Signature "FinaLeigh" 580F 135 Optimax
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  4. #4

    Re: A Bugg's tale of Yamahas and hand grenades

    That certainly is some serious bad luck.


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  5. #5

    Re: A Bugg's tale of Yamahas and hand grenades

    Sorry to hear about your bad luck Bugman.
    Darren

  6. #6

    Re: A Bugg's tale of Yamahas and hand grenades

    Feel for you M8, but, Avgas won't make em go quicker.


  7. #7

    Re: A Bugg's tale of Yamahas and hand grenades

    I have also had some Yamaha "bad luck" - just the facts ma'am - here they are - I have a boat powered by a Suzuki 70 hp 4 stroke purchased new in 2007, I have a Yamaha jet ski VX deluxe 4 stroke new in 2009. (these are made for the commercial market and supposedly bulletproof - according my mechanic) They both do boat and jet ski licences every Saturday and Sunday - they are both flushed to the manufacturers specifications every Monday morning. Boat is serviced every 100 hours, jet ski is serviced every 50 hours. Boat has 2000 hours on the clock, jet ski has 300 hours.

    The jet ski was idling rough on January 1 2015, it went off for its 300 hour service and my mechanic says it has major corrosion issues and has replaced the block.

    Mechanic says I must not be flushing it properly, however, boat does not show any corrosion issues, it is 2 years older and flushed at the same time. Also, this my second jet ski, my first a Yamaha 2 stroke went from 2004-2009 without any corrosion issues.

    I think this jet ski was made on Friday afternoon and it is Yamaha "bad luck"

  8. #8

    Re: A Bugg's tale of Yamahas and hand grenades

    Bad luck Brett!
    Hope it comes good for you. That is a real bugger. No pun intended of course. Hope you got some over the side up north on your break.
    regards jimbo

  9. #9

    Re: A Bugg's tale of Yamahas and hand grenades

    I bet that little Honda is feeling nervous.
    Dale

    I fish because the little voices in my head tell me to

  10. #10

    Re: A Bugg's tale of Yamahas and hand grenades

    your using the same mechanic who services them to diagnose why they went bang ?

  11. #11

    Re: A Bugg's tale of Yamahas and hand grenades

    Owned yamahas [4] for the last 12 years,never an issue with any of them the f60 had 1800 hrs on it.

  12. #12

    Re: A Bugg's tale of Yamahas and hand grenades

    Funny you say this Bugman......proberbly not for you but just a bit ironic.....

    I had a f60 on a tiller steer boat which I purchased new in 2008.......had 3 years sold it with about 350hrs on it no dramas at all.........Fishing last week in the South Alligator river and spotted my old boat.....so headed over to talk to the now owner and had a little chat about the boat etc.......When I asked how she was going he said well........about 50hrs of use after purchasing the oil pump fell off and she starved and locked up......new powerhead fitted.....been good since another 400+hrs......also the gearbox seized due to a leaking seal.......gearbox replaced with secondhand unit.

    I couldn't believe it.......that motor ran like a clock the whole time I owned it and if anything had been over serviced with oil changes and alike.

    I'm now a bit nervouse with my recent little tinny purchase as it has an 07 Yamaha F50 on the back and had only 66hrs on it.........now has just over 100 but running fine.......fingers crossed.

    dan
    Confidence.......the feeling you get before you fully understand the situation.

  13. #13

    Re: A Bugg's tale of Yamahas and hand grenades

    Bug man, a question if I may....

    What rpm could you achieve with those 150's at WOT?
    Note to self: Don't argue with an idiot. They will only bring you down to their level and beat you with experience....

  14. #14

    Re: A Bugg's tale of Yamahas and hand grenades

    Sorry to hear you have problems Bugman, hope you get a resolution soon, I also have a Yammy 150, 3 1/2 years old and on the last trip ran home for 40 km on 3 cylinders, seems the top cylinder fuel injector decided to stop performing, getting them all checked now so hopefully back on the water soon. Best of luck on yours.

  15. #15

    Re: A Bugg's tale of Yamahas and hand grenades

    Not a good run of luck, I had a f60 on my 4.5m boat, it had 2500 hours on it when I sold it recently, still ran like a new one.

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