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Old 30 September 2013, 20:39   #11
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Standard can you can find at walmart or any auto parts store for $9. White with red lettering says seafoam.

Float should be parallel with the body of the carb when you hold it upside down. When the carb is all clean blow through the fuel intake of it. You should get airflow. If you then flip the carb upside down, the float should rise and now you can't blow air through it. Just a trick to check if the float works.
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Old 30 September 2013, 20:40   #12
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Seafoam
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Old 30 September 2013, 20:41   #13
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This one?

I like to ask questions.

Thanks for all your help so far. Sounds like a tune up is in order!
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Old 30 September 2013, 20:43   #14
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Yep that's it. No prob. Once you get a good understanding of kinda how things go on a 2stroke, they are all basically the same all the way up through big 250hp outboards.
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Old 30 September 2013, 20:45   #15
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Also, once you do seafoam it, take it easy for the next few hours until it gets a little carbon built up. Easier to scratch a piston when it's completely clean. Just don't beat on it WOT for an hour or so.
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Old 01 October 2013, 19:16   #16
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If I decide to change the lower unit oil, what type of gear oil should be used for a Suzuki DT40? The manual calls for Suzuki outboard gear oil or SAE 90 hypoid gear oil.
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Old 01 October 2013, 21:03   #17
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I was also going to replace the Fuel filter but it does not appear to be replaceable. Looks like you just soak it in solvent?
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Old 02 October 2013, 11:26   #18
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Quote:
Originally Posted by sailit View Post
DONT EVER USE STARTER FLUID ON A 2-STROKE ENGINE it has no oil in it and the cold start up with no oil could scratch the cylinder..
Ummm there's gas and oil in there too (possibly too much). A 2 second spray of starter fluid into a 2 stroke air intake isn't going to hurt anything.
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Old 02 October 2013, 11:29   #19
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I was also going to replace the Fuel filter but it does not appear to be replaceable. Looks like you just soak it in solvent?
SAE90 gear oil sold by marine stores everywhere.

The onboard (under the cowl) fuel filters are typically disposable plastic units which are replaced. Get a proper fuel water seperating fuel filter for the transom to supplement it though.
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Old 02 October 2013, 12:09   #20
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If I decide to change the lower unit oil, what type of gear oil should be used for a Suzuki DT40? The manual calls for Suzuki outboard gear oil or SAE 90 hypoid gear oil.
I think you just answered your own question.

BTW, if the rainwater is the cause of your non-starting, I would NOT take the thing out on the water. Outboards are meant to be used in a wet environment; if it doesn't work when damp, it's not reliable enough to run with.


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