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Yamaha F150 Harmonic balancer failure

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Yamaha F150 Harmonic balancer failure

Old 07-13-2018, 10:41 AM
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Default Yamaha F150 Harmonic balancer failure

Had my 2012 F150 (175hrs), out yesterday and the low oil alarm went off. I limped it home went to check the oil and found it was perfect. With the hood off i noticed a distinct ticking coming from the balancer. Changed the oil and filter, didnt help, pulled the balancer off and found that the port gear was toast. My question is do I need to replace the entire balancer or can i just replace the gears? And how do i remove all the gear chuncks from my oil system?
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Old 07-13-2018, 11:36 AM
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Sorry to see that. I thought the problem was mitigated by 2012. Unfortunately, my experience was the whole block had to be removed to clean the gear fibers out of the entire oil path. I think I also needed a new oil pump. Hopefully there is no other damage. Then a new balancer installed. Cost a couple thousand dollars. Maybe Yamaha will help out?
Old 07-13-2018, 11:39 AM
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Originally Posted by cw21 View Post
Sorry to see that. I thought the problem was mitigated by 2012. Unfortunately, my experience was the whole block had to be removed to clean the gear fibers out of the entire oil path. I think I also needed a new oil pump. Hopefully there is no other damage. Then a new balancer installed. Cost a couple thousand dollars. Maybe Yamaha will help out?
What he said!
Old 07-13-2018, 12:05 PM
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A 2012 production year Yamaha did not have the latest and greatest balancer installed.

If the block (bearings and bushes) are not damaged due to running with the absence of oil then the block will have to be disassembled and cleaned of any and all debris. A complete tear down may be needed. The mid-section as well. Including the oil pump.

The balancer comes as an assembly. The entire part is replaced. Gears are not available separately.

Low time motor with an aging early configuration balancer can be a problem in the making.
Old 07-13-2018, 12:31 PM
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What year did they update it? I have a 2013 f150xa....
Old 07-13-2018, 01:53 PM
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I truly don't understand why other Yamaha F150 owners just don't take them off and leave them off. The balancers are not needed.
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Old 07-13-2018, 01:58 PM
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Blatant incompetence by yammy engineers that they have not solved the flawed balancer issue after how many tries? Years? Really inexcusable. Gotta say, yammy losing my respect & confidence. I had 2 f150 motors where balancers needed replacing, & both "made oil." Totally unacceptable. We can put men on the moon but not make a trouble free outboard?
Old 07-13-2018, 01:59 PM
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My motors were 2005 & 2012.
Old 07-13-2018, 02:01 PM
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Kind of makes you wonder why Yamaha don't leave them off then, or why they have a few revisions to attempt to get them right if it's not needed, but then what would Yamaha know?
Old 07-13-2018, 05:16 PM
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Originally Posted by alloyboy View Post
A 2012 production year Yamaha did not have the latest and greatest balancer installed.

If the block (bearings and bushes) are not damaged due to running with the absence of oil then the block will have to be disassembled and cleaned of any and all debris. A complete tear down may be needed. The mid-section as well. Including the oil pump.

The balancer comes as an assembly. The entire part is replaced. Gears are not available separately.

Low time motor with an aging early configuration balancer can be a problem in the making.
Was it not mid calendar year 2012 that -04 was released? Understanding there were
many produced prior to that....Still trying to find a -04 failure and a blown F200 balancer.... looks like the problem may have been solved.
Old 07-13-2018, 05:55 PM
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Funny I never hear any problems with balancers on Suzuki engines! I assume they have balancers. I have a Yamaha two stroke right now - no balancers. When I repower, I may look at Suzuki unless Yamaha has truly solved the problem.
Old 07-13-2018, 06:47 PM
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Originally Posted by pstephens46 View Post


Was it not mid calendar year 2012 that -04 was released? Understanding there were
many produced prior to that....Still trying to find a -04 failure and a blown F200 balancer.... looks like the problem may have been solved.

Yamaha parts book shows the first F150 model with the -04-00 balancer as having a production date of 01/2013. An F150A model. If the -04-00 configuration has failed I am not aware of it.
Old 07-13-2018, 08:03 PM
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Sorry to hear that. What about someone with 2004 F150's with 2000 hours on them? Would it be assumed the balancer's have been replaced with the correct ones since it hasn't blown up yet?
Old 07-13-2018, 08:13 PM
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What is the actual manufacture date on the motor?
Old 07-13-2018, 08:24 PM
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Originally Posted by alloyboy View Post
Yamaha parts book shows the first F150 model with the -04-00 balancer as having a production date of 01/2013. An F150A model. If the -04-00 configuration has failed I am not aware of it.
I’ll try to remember this....
Old 07-13-2018, 08:28 PM
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Originally Posted by BigNiner19 View Post
Sorry to hear that. What about someone with 2004 F150's with 2000 hours on them? Would it be assumed the balancer's have been replaced with the correct ones since it hasn't blown up yet?
No. Not necessarily.

A motor with lots of time on it, even if the motor is old, does not appear to suffer the same failure rate that the same age motor, or possibly even a younger motor, does with low time on it. Looks to be a matter of use it or possibly lose it. Some stuff does not like to be unused. Early configuration balancers seem to fit within that category.
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Old 07-13-2018, 08:34 PM
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Have a pair of 05 F150s. Around 1200hrs. One engine did the balancer around 700hrs and the other one is still OK. Maybe Yam had two different suppliers for the plastic gears or maybe their was just a straight quality control issue or maybe it only happens on Monday, Wednesday and Friday built engines. Yamaha might know but they aren't saying. We just stripped the plastic gear right down and reinstalled the balancer after of course removing the power head and mid section etc to clean the oil pickup and sump. You can't tell the difference.
Old 07-13-2018, 08:39 PM
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Originally Posted by alloyboy View Post
Low time motor with an aging early configuration balancer can be a problem in the making.
So we should just avoid this to have no problem with a Yamaha, right?
Old 07-13-2018, 08:43 PM
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Probably avoid a Yamaha altogether. Requires too much thought and creates horrible anxiety.
Old 07-13-2018, 09:17 PM
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It's too late once you have them unfortunately.

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