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| Jump to page : 1 Now viewing page 1 [25 messages per page] Walleye Fishing -> General Discussion -> Black Hose versus Gray Hose. |
walleye express |
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 Member Posts: 2680 Location: Essexville, MI./Saginaw Bay. | I've had a Yamaha 1988, 90 horse 2 cycle Jet Drive motor on my SmokerCraft Jet Boat for roughly 26 years now. This boat and motor have performed flawlessly during all those years in the hottest and coldest of temperatures that Michigan can dish out. In all those years I've changed the spark plugs on the motor a total of 3 times. Twice just because I thought it was a good idea. For the Lack of grief and dependability all these years, this rig doesn't owe me a dime. In the last 2 trips while trolling at Idle RPM's the engine has seemed to run out of gas and I have to hurry and pump the tank primer Ball to get the pressure back into the hose. This problem seemed to start right after my favorite Marathon Gas station had their holding tanks and pumps replaced. Seems they went from 10% alcohol to 15%. After all these years, I figure this would not matter with oil injection. Anyway, I took my entire hose off (thinking it had a small hole worn in it someplace causing it to lose prime) and took it to be duplicated at my favorite Marina and supply store. I was asked to bring my boat in after the hose passed the leak test and before another Black Hose duplication and they found micro pieces of black rubber in all my carbs on the motor. I was told that the new alcohol content was melting/breaking down the black rubber and that I should replace it with the new (more expensive) Gray rubber which is alcohol proof. Does this sound right to all you guys? Edited by walleye express 8/1/2013 9:42 AM
Attachments ----------------  TittabawasseeRiver3_15_05014_10_sized.jpg (92KB - 149 downloads) | ||
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| Shep |
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| walleye express |
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Member Posts: 2680 Location: Essexville, MI./Saginaw Bay. | Shep - 8/1/2013 10:51 AM Yes. But it's not the 15% that did it. It's been happening for as long as you've been using alcohol. I would see if yammy has carb rebuild kits with the new gasket material, too. And maybe even the fuel pump. Ouch, I didn't want to hear that.  Do you think after this hose replacement it would be to late for the carbs and pump gaskets if I simply stoped using that stations gas? Would any kind of gas supliment discourage/stop any similar harm?Edited by walleye express 8/1/2013 11:24 AM | ||
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| Car Man |
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| walleye express |
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Member Posts: 2680 Location: Essexville, MI./Saginaw Bay. | Car Man - 8/1/2013 12:39 PM Shep is right. In an engine that old it has been a process over time that the 10% has started and the 15% has pushed over the top. 15% should not be used in any outboard especially one that old. Once the fuel system is cleaned/repaired, including the tank, you should use fuel with no alcohol/ethanol if possible. If that is not possible, use 10% with one of the many additives available to help with this issue. Check this site for pure gas in your area. http://pure-gas.org/index.jsp Thank's for the info. Looks like I'll have to stick with 10%. The only locations listed at puregas.org are marinas with gas prices off the chart. But she goes in tomorrow morning and everything gets checked and/or replaced if it even looks like it might fail. My gas can filling habbits will be restricted and regimented from here on out. I owe the old girl that much.  Edited by walleye express 8/1/2013 5:23 PM | ||
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| FishnFool |
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| walleye express |
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Member Posts: 2680 Location: Essexville, MI./Saginaw Bay. | They replaced the fuel pump (it to is 26 years old), checked all carb gaskets and rubber lines, emptied/cleaned out the seperator bowl and replaced the black hose and pump bulb with another black hose and pump ball. They ran the motor at idle for 20 minutes and it never missed a beat. I also bought a case of their Yamaha recommended gas additive. 1 bottle treats 24 gallons which is not that bad of a deal for me with how close I live to the great fishing. I usually use only 6 or 7 gallons total per 5 hour trip. Good now for another 26 years or when Obama forces us to go to solor powered engines.  Edited by walleye express 8/5/2013 8:18 AM | ||
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| Shep |
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| terroreyes |
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| stacker |
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| terroreyes |
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I understand them and know which can aziotrope water off. Formulary Chemical Engineer by day.  We use certain alcohols in waterborne paints for the sole purpose of binding with water to speed up drying time. I was just pointing out the misnomer that people think additives will stop the compatibility issue. With the compatibility issue of elastomers, coatings, and alcohols, the alcohol type doesn't make a huge difference. They're all destructive to alcohol sensitive materials. Adding a fraction of a percent of IPA to your fuel isn't going to push the compatibility issue over the top, as I stated, like an addition of 5% more ethanol might, as Dan found out. I use Sea Foam or QuicKleen in every tank myself, as well as ethanol Stabil. Edited by terroreyes 8/13/2013 5:44 PM | |||
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| walleye express |
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Member Posts: 2680 Location: Essexville, MI./Saginaw Bay. | Now I don't want you to Chemical Geeks to get into a high-tec fight over this post. Hell, it took me a while to understand the "Yellow Snow" warning and theory. I took the boat out yesterday on the river with the girlfriend for Salmon since the new replacements, and she did everythng better. I mean the boat not the girlfriend. Started faster, warmed up and slow idled sooner/smoother, and ran maybe 3 MPH faster on plane for some reason. But I want to thank you both for the explanations and advice. Jim, we got to get together once and fish the Saginaw or Tittabawassee river this fall. Edited by walleye express 8/14/2013 10:48 AM Attachments ---------------- PM 002.JPG (145KB - 106 downloads) | ||
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| terroreyes |
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| walleye express |
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Member Posts: 2680 Location: Essexville, MI./Saginaw Bay. | The river action can start as early as late September depending on the temps then. PM Me your phone numbers and I'll call you when the bite gets started. | ||
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