Author
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Topic: Evinrude Carburetors
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Whalerdan |
posted 09-29-2003 12:23 PM ET (US)
My 1998 Evinrude Ocean Pro 90 just would not idle in gear after the engine warmed up. Yesterday I sprayed carb cleaner with an aerosol can, with a long tube attached to the tip, back at (what I assume) is the output point of the jets in the carbs. I also opened the butterfly and sprayed everything real good and let it set for a hour or so. Then I took the boat out for a shake down run. What a difference! I didn't die at all and idled smooth.I have two questions though. One, I know it's a little late now, but could I have damaged anything doing this? I mean that stuff would run through the cylinders with no oil to accompany it. Could there be enough to hurt the rings or cylinders? Seems to me no, but I'm just wondering out loud. Also, the throat with the bowl and jets seems to be made of plastic. Could that stuff dry rot the plastic and cause it to crack later? Has anyone experienced something like this? Second, I was looking at the carb set-up and it looked to me that you could remove the bowl, throat, jet section of the carb without removing the butter fly valves. I was thinking (if I got ambitious) I could remove this section of the carb for cleaning without affecting the sync linkages? I don't think I need to now, since it seems to be working fine, but I was just wondering could this be done? I don't have a manual. I had one on my last motor and it covered so many years and hps the info in it was only enough to get you in trouble. So I'm a little reluctant to buy one now. Maybe the actual Evinrude Shop manual would be better but I'm sure their a little pricey. Danny
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SWarren
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posted 10-01-2003 09:49 AM ET (US)
Dan,Call Al Evans 843-568-7811, he was a mechanic at the outboard shop for 11 years, and went out on his own. He will come to your house and is certified omc and yamaha, it will probably cost you about 120 for a carb rebuild. Steve |
kingfish
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posted 10-01-2003 10:18 AM ET (US)
Dan-I don't think you did anything harmful at all. Another idea you might consider as well as Steve's is to run some Techron through your motor from a seperate tank in a high concentration to clean *everything* in your carbs. Bigshot swears by this (and following his suggestions, I have had good luck "tuning" my 1992 Evinrude 225 carbs using this method) and I think there are a number of threads you could search for "Techron" in, and find a fair amount of discussion. I think Bigshot has also mentioned another product, the name of which I don't recall, that acts like "Techron on steroids", used in the same way. I wish I had access to someone like the guy Steve describes, who will come to you to work on your motor - that sounds like a really convenient deal... Good luck- John |
Whalerdan
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posted 10-01-2003 10:35 AM ET (US)
Thanks Steve. Sounds like a good guy to work with.Danny |
TampaTom
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posted 10-01-2003 10:52 AM ET (US)
Unlikely that would harm the engine. You can also spray OMC Engine Tune up into the carbs with the engine running. It cleans up the carbs as it "de-carbonizes" the combustion chamber.I don't think occasional use of spray carb cleaner will have a significant effect on the plastic. Prolonged exposure might. I've done the carb bowl removal trick. Your time is better spent removing the carbs. Its not difficult, much more productive, and it doesn't take much more time. The carb and parts cleaner that comes in a gallon can (throw parts in it to soak) will completely eat plastic away. Carb needs to be disassembled, removing all plastic and rubber. Results are far superior to spray cleaners.
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brisboats
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posted 10-01-2003 10:55 AM ET (US)
Techron on steroids is Berryman's B-12 available here at Wal-Mart. Yes you can remove the carb bowl without removing the butterflies, suggest you get a manual if you decide to do this. Brian |
Whalerdan
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posted 10-01-2003 11:09 AM ET (US)
I know you can remove the bowl without removing the butterfly's. I was asking if you could remove the bowl, jet, throat assembly without removing the butterfly? It seems like it is a plastic assembly that bolts to the butterfly assembly.Like I said, my last manual (on my old engine)was too broad to cover this type of thing. For example: When I first removed the lower foot to change out the water pump, the manual didn't say anything about the bolt that attaches the shift rod to the shift linkage. After wrestling with it for and hour I realized it was there. Having never done this before I didn't know about it. Seems if you don't pay the big bucks for the factory manual your just wasting your money. After growing up with motorcycles and farm machinery, using this site, and a little common sense I can usually figure out how to do things as well as that cheap manual showed me. Danny
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Whalerdan
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posted 10-01-2003 11:12 AM ET (US)
One more question. I thought the Techron/Techron on steriods trick was for carbon in the engine. Will it help clean the carbs too?Danny |
Sal DiMercurio
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posted 10-01-2003 12:09 PM ET (US)
If you guys would read your manuals it will tell you to use,....OMC ...Enginetuner,....Yamaha,....Ringfree,....Merc,...Power tune. These products are for the application your looking for. They clean your carbs, injectors & remove carbon. Just follow the direction on the cans. Sal |
kingfish
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posted 10-01-2003 02:49 PM ET (US)
My understanding of Techron's value (and my use of it) was for cleaning the carburator, not removing carbon (although it may do that; I just don't know).kf |
brisboats
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posted 10-01-2003 07:47 PM ET (US)
On the crossflows, you can simply remove the carb and seperate the float chamber from the body of the carb, the high speed and low speed jets are in the float chamber. You do not need to remove the butterflys nor should you mess with them. Spring the $20 and get yourself a Seloc manual etc. and your looper carbs will be a lot less mysterious. You wouldn't navigate unfamilar water without a chart so why take the chance here. Yes techron will help in decarbing and engine as will berrymans b-12 run in the gas. Brian |
Whalerdan
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posted 10-02-2003 08:16 AM ET (US)
I'll probably get the cheap manual and if it starts happening again I' probably call the guy Steve mentioned.I don't think my engine is a "Looper" though. My old one was. |
skookum point
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posted 10-03-2003 01:58 AM ET (US)
Whalerdan - I recently bought (on ebay) a complete set of OMC shop service manuals for the 1997 model year. I don't need the volume that covers the 90, 105, 115, 150 and 175 motors. If this is what you need send me $15 (postage included)and it's yours. It's in new, unused condition and appears to have complete carburetor assy/disassy instructions.John Anderson |
Whalerdan
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posted 10-06-2003 07:39 AM ET (US)
John,I sent you an E-mail. I'll take that manual. Let me know where to send the money. Thanks, Danny |
Whalerdan
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posted 10-08-2003 08:35 AM ET (US)
^ |
skookum point
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posted 10-08-2003 11:48 AM ET (US)
Danny, I replied to your email, I'll try again. |
15ftlover
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posted 10-08-2003 03:59 PM ET (US)
SWarren, saw your post about Al Evans and that looks like a Charleston or coastal S.C. number. Does Al work on mercury engines and is he in the Charleston area? Thanks for any input |
Whalerdan
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posted 10-15-2003 09:15 AM ET (US)
John,Got the manuals you sent last night. Can't thank you enough. These are faaarrrrr better than the aftermarket manuals. I sat down and read the carburetor cleaning section. The instructions looked pretty clear and a picture for each step looks like it will really help. Don't know what I ever did with out them. Thanks Again, Danny Shaw |