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Post by fishnfool on Aug 21, 2022 8:36:06 GMT -5
Some of you may remember my story from a couple of years ago about my starboard motors that blew a hole through the exhaust guide and apron. I had the exhaust guide replaced which requires the block and lower to be removed to the tune of +/-$3k. Also gas the oil pump done at the time and speedi sleeve installed since the block was off. Well, at some point during an 20 mile run home yesterday the port motor blew a hole. I was pulling into my slip and and heard the difference the exhaust noise and I knew right away. The good news I guess is I already had the oil pump and speedi sleeve done on the port motor so all I should have to worry about is the exhaust guide and apron, still going to be expensive. Motors ran beautifully yesterday cruising at 42 mph. 1100+ hours
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Post by hookedup on Aug 21, 2022 9:19:28 GMT -5
Not a pretty sight. I know it's frustrating to have to go through it a second time.
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jerryk
Captain
When not online I'm likely on Knot Online
Posts: 597
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Post by jerryk on Aug 21, 2022 10:52:59 GMT -5
Big time bummer! Sure seems to be a weak spot on that engine to have both of them do the same thing. At least they are consistent...
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Post by fishnfool on Aug 21, 2022 14:12:29 GMT -5
A tech on another forum just a posted a pic of a 2017 F150 he is doing the exhaust guide replacement for the 2nd time because the same thing happened TWICE
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Post by fishnfool on Aug 21, 2022 14:15:26 GMT -5
Wire wheeled, zinc chromate primer and JB Weld high heat. 2nd coat goes on tomorrow. Would like it if this could get me through the season or at a minimum until the shop can get all of the parts in and take my boat.
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jerryk
Captain
When not online I'm likely on Knot Online
Posts: 597
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Post by jerryk on Aug 21, 2022 14:18:19 GMT -5
I'm impressed that you have this much done already!
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Post by hookedup on Aug 21, 2022 14:21:24 GMT -5
Big time bummer! Sure seems to be a weak spot on that engine to have both of them do the same thing. At least they are consistent... Several models of older Yamaha outboards are known to have this problem. A lot of back and forth on the issue, but essentially Yamaha won't take responsibility and says it's not their problem. Some have failed with as little as 500 hours. Even BoatUS tried to get Yamaha to step up to the problem and got this response:
BoatUS contacted Yamaha by phone and letter to discuss this problem. In a response letter to BoatUS, the company sidestepped the corrosion issue and wrote, "The outboards you mention have been out of warranty for quite some time. We would like to remind our customers that the best way to prevent the issues encountered is to flush the motor after every use with plenty of fresh water." Despite repeated requests from BoatUS, Yamaha would not provide further clarification about how flushing the engine would prevent corrosion of the dry exhaust parts.
Rumors are the newer Yamaha outboards have either a coating or different alloy and shouldn't have the problem. And for sure it's not due to any fresh water flushing issues. The answer Yamaha provided was only to avoid responsibility.
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Post by hookedup on Aug 21, 2022 14:30:01 GMT -5
Wire wheeled, zinc chromate primer and JB Weld high heat. 2nd coat goes on tomorrow. Would like it if this could get me through the season or at a minimum until the shop can get all of the parts in and take my boat.
Looks good and it should hold up for the rest of the season. Hope so.
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Post by fishnfool on Aug 21, 2022 14:58:32 GMT -5
I'm impressed that you have this much done already! Thanks. The more time wasted = less time on the water. I only lost one nut to the water too. My prior experience with my port motor helped. I mutilated the apron on the other motor trying to get it off. This one, I was able to get off with ease such that I'll be able to reinstall it to use the boat until I get it in the shop to get fixed.
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Post by fishnfool on Aug 21, 2022 15:00:31 GMT -5
Big time bummer! Sure seems to be a weak spot on that engine to have both of them do the same thing. At least they are consistent... Several models of older Yamaha outboards are known to have this problem. A lot of back and forth on the issue, but essentially Yamaha won't take responsibility and says it's not their problem. Some have failed with as little as 500 hours. Even BoatUS tried to get Yamaha to step up to the problem and got this response:
BoatUS contacted Yamaha by phone and letter to discuss this problem. In a response letter to BoatUS, the company sidestepped the corrosion issue and wrote, "The outboards you mention have been out of warranty for quite some time. We would like to remind our customers that the best way to prevent the issues encountered is to flush the motor after every use with plenty of fresh water." Despite repeated requests from BoatUS, Yamaha would not provide further clarification about how flushing the engine would prevent corrosion of the dry exhaust parts.
Rumors are the newer Yamaha outboards have either a coating or different alloy and shouldn't have the problem. And for sure it's not due to any fresh water flushing issues. The answer Yamaha provided was only to avoid responsibility.
Not just older Yammys, 2017 and newer motors have seen similar dry exhaust corrosion problems unfortunately. See post above of a story shared just today by a Yammy tech - I'll post pics of that 2017 motor in a sec. I cant believe Yamaha hasn't figured out what seems like a metallurgy problem. And their "flush the motor" excuse is BS! Flushing doesn't hit the DRY exhaust. Yamahas cop out, which theyve even used to deny warranty claims.
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Post by fishnfool on Aug 21, 2022 15:06:31 GMT -5
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Post by hookedup on Aug 21, 2022 15:17:22 GMT -5
Sad that Yamaha hasn't figured it out. I saw your note after I had submitted the BoatUS stuff. I didn't know it hadn't be solved. I do know Mercury engines had the same problem years ago too. Not sure if they fixed their issue yet either.
It would nice if they came up with either a fix, or some inexpensive fuel treatment to resolve the corrosion problem. Maybe a redesigned exhaust so the area likely to corrode is easier to replace?
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Post by fishnfool on Aug 21, 2022 15:59:32 GMT -5
Granted my motors were put into service 12 yrs and 1100+ hrs ago but still and this is being reported happening on a lot newer and some cases very low hour motors.
Yamaha did come out with the kit for the F225/F250s which was supposed to have some sort of better coating on it. At least it seems Yamaha semi-aknowlged the problem then but didn't seem to fully address it theough the metal procurement/casting process.
Some speculate it's caused from operating the engine for long hours at low RPM or from not being propped right and lugging the motor creating high temps. And I say those are BS reasons why the dry exhaust is corroding out the way it is. It should NEVER happen regardless of how much trolling you do or because your max RPM is a few hundred RPMs below maximum.
I love the motors and they have otherwise been pretty darn reliable but damn they are getting expensive to maintain.
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Post by finatic on Aug 21, 2022 17:51:20 GMT -5
WTF, you can't catch a brake. To run your boat at 42 mph what rpms are you turning.
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Post by fishnfool on Aug 21, 2022 18:08:59 GMT -5
WTF, you can't catch a brake. To run your boat at 42 mph what rpms are you turning. I was somewhere around 5100/5200 RPM.
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