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 Catalina/Capri 25/250 Sailor's Forums
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 Seafoam works!		  New Topic  Topic Locked
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dmpilc
Master Marine Consultant

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USA
4593 Posts
Initially Posted - 05/31/2011 :  10:02:37  Show Profile
I made a note of this in the C-25 forum discussing 3 gal tanks, but I thought I'd mention it here, too.
Our Nissan 9.8 was not idling at all; it would stall. Someone said it was probably a clogged low idle jet and that the carb might need pulling, but to try a high concentration of Seafoam first.
I put the entire pint into 2 gallons of fresh gas and ran that mixture at medium RPM's at the dock and took a few power rides over a period of about 3 weeks, while sailing and doing other projects on the boat. Coming back from a sail this past Saturday, I noticed that the motor did not stall out when I throttled back entering the docks, and it idled while we put the boat away.
Yesterday, it was idling just as nice as you please. I haven't checked the tank with Seafoam yet, but I suspect that I may have burned less than a gallon of the treated gas.
I'm thrilled that it worked and I do not have to remove the motor or haul the boat to remove the carb.
Seafoam is a great product!!!!!!
DavidP
1975 C-22 SK #5459 "Shadowfax" Fleet 52
PO of 1984 C-25 SK/TR #4142 "Recess"
Percy Priest Yacht Club, Hamilton Creek Marina, Nashville, TN
Edited by - dmpilc on 05/31/2011 10:04:01

Davy J
Master Marine Consultant

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USA
1511 Posts
Response Posted - 05/31/2011 :  10:11:50  Show Profile
I am glad the Seafoam worked. I purchased some but never put it in the tank. Keep this in mind, If you do need to pull the carb, you do not need to remove the motor or haul the boat. It literally has only two bolts holding it in place.
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delliottg
Former Mainsheet C250 Tech Editor

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USA
4479 Posts
Response Posted - 05/31/2011 :  11:03:04  Show Profile  Visit delliottg's Homepage
Agreed, my Tohatsu only has two bolts holding the carburetor on. If I backed the boat up to the dock, it'd be pretty easy to remove sitting on the dock. Admittedly, I'd rather do this while on the trailer because Neptune's greed doesn't extend inland beyond the shoreline so dropped parts can be retrieved.

I did exactly this last weekend (instead of launching the boat), and it was a lot less of a job than I expected it to be.

And I'll be picking up a can of Sea Foam to put in my little 3 gallon tank, it's idling kind of rough.
Edited by - delliottg on 05/31/2011 11:03:52
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Dave5041
Former Mainsheet Editor

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USA
3758 Posts
Response Posted - 05/31/2011 :  11:56:22  Show Profile
All of the "mechanic in a can" products will work fairly well with deposits light enough that your engine is rough but still runs; you might try a shot every Spring and a spray carb/throttle plate cleaner in the Fall with the engine running as a maintenance procedure.
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redviking
Master Marine Consultant

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USA
1771 Posts
Response Posted - 05/31/2011 :  12:32:31  Show Profile
All of the outboard mechanics I have ever hired have told me to never use additives of any sort.

sten
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dmpilc
Master Marine Consultant

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USA
4593 Posts
Response Posted - 05/31/2011 :  14:49:36  Show Profile
I was lucky this time, I guess. good to know that it is only 2 bolts holding it on, but with my usual luck, I would drop one in the water. What really pushed me to try the stuff was that the motor ran great given a bit of throttle, it just wouldn't idle at all. I figured I'd try the stuff and if it didn't work, I would pull the carb. I had even bought a spare low idle jet to be ready.
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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.