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Post by finatic on Aug 21, 2022 18:36:52 GMT -5
Got it, I know these motors are built to run at high rpms I just prefer not to. I very rarely run over 4500.
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Post by Twisted on Aug 22, 2022 8:53:34 GMT -5
I had the corrosion issue on an older boat with a 2003 Yamaha F225 (about 500 hours on it). Yamaha would not take any ownership of it and of course my insurance agent denied my claim. However, the guy that worked on that boat and all of my boats to date fought with my insurance company showing them it was manufacturer defect and not any fault of my own. In the end they actually covered my claim! All that being said I am still a big fan of Yamaha's and have one on my boat today. With all of the work we put our engines through I am actually surprised there are not more failures. That is why I don't mind paying each season to have it thoroughly worked on!
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Post by reelkul on Aug 22, 2022 9:17:54 GMT -5
I have the 2006 F250s Yamahas where other owners experience corrosion issues. I just scoped my engines a few weeks ago and I could not see any corrosion pits all the way into the engine block. I spent extra time inspecting the junctions between the block and the exhaust guide where they have a tendency to corrode. I purchased a borescope a few years ago and I do this inspection every time I drop the Lower Unit. From my knowledge of metals and internal combustion engine exhaust, the corrosion issue has to do with the gas that users put through their engines, and the additives. Ever since my engines were new, I have only used non-ethanol gas and I always use ring-free when I add fuel. Exhaust gas is very corrosive, and ethanol fuel makes it even more corrosive. One of the functions of Ring-free is to neutralize the exhaust gas. I just came back from Europe, and spent some time at a Yamaha dealer/repair shop and I chatted up with the owner. I spoke to him about the corrosion issues in Yamahas that US owners are seeing, and he said that he has heard of it, but he has never seen an engine with the exhaust corrosion in 30+ years. The marina gas station where the shop was located offered 95 and 100 octane petrol, with no ethanol. Even on-land gas station fuel is ethanol free. So, in-short use only non-ethanol fuel, and add a Ring-free to the gas. fishnfool I know you said that your marina does not offer ethanol free fuel, but I think that its time to look for a fuel delivery service to your dock.
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Post by fishnfool on Aug 22, 2022 9:30:08 GMT -5
I use Ring Free.
This doesn't seem to be as prevalent an issue with other manufacturers so I still believe this a casting/metallurgy problem at Yamaha, which isn't to suggest your theory isn't a valid one.
If ethanol is a contributor, Yamaha should reexamine its manufacturing process like they did with the rest of the fuel delivery systems when they upgraded all of the fuel lines etc.
Yamaha has acknowledged the corrosion issue even in the Yamaha F150 Service Manual. It states that the exhaust guide is to be inspected and of necessary replaced at 1k hrs. So it's like theyve recognized the issue and treat like an anode that may or may not need to be replaced.
Hard to believe an engineer at Yamaha hasn't been charged with figuring this out.
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Post by fishnfool on Aug 22, 2022 22:08:39 GMT -5
Here's a recent post from a guy with a 2018 F150, same problem, always uses non ethanol fuel...
I have a 2018 150HP with ~400 hours that has experienced the exact same issues as others on this thread with a hole corroding through the exhaust midsection. Similar to others, I religiously flush with fresh water (although operate in saltwater) after each use. I'm running the factory prop, I use non-ethanol gasoline every time and follow Yamaha's "Maintenance Matters" routine. None of that was enough to avoid the issue with Yamaha's poor design/manufacturing in this area of the motor. I'm going to pick up my boat today after having been in the shop for 8 weeks, missing most of a summer's boating weather. My motor is about 8 months out of warranty and I contacted Yamaha's support team and "good will" department but they weren't willing to do anything. All told, it was close to $1000 in labor (8 hours) and $800 in parts (midsection, gaskets and oil change kit - required due to disassembly) and $120 in taxes for a total of $1929. I'm pissed. There a lot of people that will tell you Yamahas are reliable motors, but you should talk to your local mechanics. They'll all tell you that Mercury and Suzuki have surpassed Yamaha significantly. They also acknowledged this is a common issue with Yamahas. I hope others have better luck than I did. I can tell you I'll never buy another Yamaha again.
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Post by schlnrnd on Aug 23, 2022 5:28:27 GMT -5
Wow. Sorry to hear. Tough to stomach those types of repairs and owning twins we know a repair on one means to be prepared for the other engine soon. Which SUCKS! Hoping you get a quick repair and continue your 20 Mike trips.
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Post by hookedup on Aug 24, 2022 13:43:06 GMT -5
Got to love this. I found this from a ‘certified Yamaha mechanic’ in an article about taking care of your engine.
What is Dry Corrosion: This type of corrosion happens in places that don’t come into direct contact with water — for example, the exhaust system. When the boat’s fuel is burned off sulfate salts are created, and these salts are highly corrosive, which means if your outboard’s cooling passages aren’t cleaned regularly corrosion will happen. This is why you need to flush your engine out with clean water for at least fifteen minutes after each trip you take. This is a crucial part of corrosion prevention.
Really?
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Post by fishnfool on Aug 24, 2022 13:49:01 GMT -5
Got to love this. I found this from a ‘certified Yamaha mechanic’ in an article about taking care of your engine. What is Dry Corrosion: This type of corrosion happens in places that don’t come into direct contact with water — for example, the exhaust system. When the boat’s fuel is burned off sulfate salts are created, and these salts are highly corrosive, which means if your outboard’s cooling passages aren’t cleaned regularly corrosion will happen. This is why you need to flush your engine out with clean water for at least fifteen minutes after each trip you take. This is a crucial part of corrosion prevention. Really? Yea that makes sense. NOT! LMAO
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Post by fishnfool on Aug 24, 2022 13:49:40 GMT -5
Well my parts are ordered so it's possible I'll be taking the boat in next week. $2,500
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Post by hookedup on Aug 24, 2022 13:55:02 GMT -5
Hope they come in quick and they fix quick.
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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 24, 2022 13:56:51 GMT -5
And under the estimate! Like that ever happens...
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Post by fishnfool on Aug 31, 2022 11:19:17 GMT -5
My JBWeld repair is holding so far. Ran thr boat a few times and most of the afternoon Saturday. Will be running her agin this week/weekend.
Shop is still waiting on a couple of gaskets to come in. Hope to be able to drop her off next Monday or Tues in the Hope's of getting her back by the end of the week.
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Post by hookedup on Aug 31, 2022 15:12:27 GMT -5
Glad you're still able to use the boat. That JB Weld is good stuff.
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Post by fishnfool on Sept 4, 2022 22:24:59 GMT -5
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Post by hookedup on Sept 5, 2022 7:15:51 GMT -5
Gulp..My engine is a 2018.
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