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 9.8 Tohatsu Troubles		  New Topic  Topic Locked
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instntpudn
Deckhand

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USA
4 Posts
Initially Posted - 08/22/2013 :  20:29:54  Show Profile
Short story: Went to change the impeller, put the motor in my truck like it shows in the manual and drove it home. When I got home all the oil had spilled out of the engine, great. So after I changed the impeller, I then cleaned the carb and replaced the spark plugs.

Got it back in the water and my water pump is pumping well, but now when I put the engine anywhere above idle, it stalls out completely. Where to start? I've already taken the carb back apart to make sure i didn't missing anything...

Thanks in advance
Edited by - on

instntpudn
Deckhand

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USA
4 Posts
Response Posted - 08/22/2013 :  20:32:18  Show Profile
i didn't replace any of the gaskets because they all looked to be in pretty good shape. However, this diagram shows an O-ring that I didn't have between the air intake and the carb, #10 on page 13:
http://www.tohatsuoutboardparts.com/Parts-Catalogs/Parts%20Catalog%20MFS8A3-9.8A3%20(2009)%20-%20(00221051-4).pdf
Edited by - instntpudn on 08/22/2013 20:32:40
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instntpudn
Deckhand

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USA
4 Posts
Response Posted - 08/22/2013 :  20:34:00  Show Profile
Also, when i first started the engine today it would rev high, the longer it went, the worse it got, until it could barely idle.
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delliottg
Former Mainsheet C250 Tech Editor

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USA
4479 Posts
Response Posted - 08/22/2013 :  21:27:24  Show Profile  Visit delliottg's Homepage
Bill,
Welcome to the forum. I went through something similar with my Tohatsu a couple of years ago. Spend the time to thoroughly clean the jets in the carburetor. It sounds like your high speed jet may be clogged, or your vent to atmosphere is plugged with a bit of oil or other residue.

I ended up using my ultrasonic cleaner to clean mine, and then blowing it out with compressed air. A rebuild kit is fairly inexpensive if the gaskets don't survive the take down, or as you say you're missing an o-ring. I like getting stuff from iBoats, but there are many other places to get parts.

Good luck, I know how frustrating an unreliable outboard can be, I futzed around with mine for nearly a year before I got it working properly again. Let us know how it works out, and ask lots of questions, there are lots of us on here with the same engine.
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Stinkpotter
Master Marine Consultant

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Djibouti
9080 Posts
Response Posted - 08/22/2013 :  22:00:08  Show Profile
<blockquote id="quote"><font size="1" face="Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote"><i>Originally posted by instntpudn</i>
<br />Also, when i first started the engine today it would rev high, the longer it went, the worse it got, until it could barely idle.
<hr height="1" noshade id="quote"></font id="quote"></blockquote id="quote">Sorry if this sounds silly, but the symptoms sound like a closed tank vent. (It's happened to the best of us.)
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instntpudn
Deckhand

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USA
4 Posts
Response Posted - 08/22/2013 :  22:07:01  Show Profile
the external gas tank vent? I'll give it a check tomorrow, that does sound possible...

<blockquote id="quote"><font size="1" face="Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote"><i>Originally posted by Stinkpotter</i>
<br /><blockquote id="quote"><font size="1" face="Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote"><i>Originally posted by instntpudn</i>
<br />Also, when i first started the engine today it would rev high, the longer it went, the worse it got, until it could barely idle.
<hr height="1" noshade id="quote"></font id="quote"></blockquote id="quote">Sorry if this sounds silly, but the symptoms sound like a closed tank vent. (It's happened to the best of us.)
<hr height="1" noshade id="quote"></font id="quote"></blockquote id="quote">
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OJ
Master Marine Consultant

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USA
4382 Posts
Response Posted - 08/23/2013 :  17:56:55  Show Profile
<blockquote id="quote"><font size="1" face="Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote"><i>Originally posted by Stinkpotter</i>
<br /><blockquote id="quote"><font size="1" face="Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote"><i>Originally posted by instntpudn</i>
<br />Also, when i first started the engine today it would rev high, the longer it went, the worse it got, until it could barely idle.
<hr height="1" noshade id="quote"></font id="quote"></blockquote id="quote">Sorry if this sounds silly, but the symptoms sound like a closed tank vent. (It's happened to the best of us.)
<hr height="1" noshade id="quote"></font id="quote"></blockquote id="quote">been there, done that . . . even forgot (just once) that I have to push a lever to tilt the motor!
Edited by - OJ on 08/23/2013 17:57:20
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Notice: The advice given on this site is based upon individual or quoted experience, yours may differ.
The Officers, Staff and members of this site only provide information based upon the concept that anyone utilizing this information does so at their own risk and holds harmless all contributors to this site.