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Old 04-09-2005, 01:19 AM
Britt's Avatar
Britt Britt is offline
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Join Date: Apr 2005
Boat: 1988 ProStar 200 ProV-Yamaha 200, High Five stainless
Posts: 140
Gas tank additive

Im sure I could find 30 pages on additives however.....I have a yamaha outboard 200 and I want to run some type of an engine clean through the tank. Something to the effect of Sea Foam or something else. My question is what do you guys recommend??

1992 Barefoot 200, Yamaha 200hp Pro-V, Mercury "High Five" Stainless five blade......Ride'n dirty
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Old 04-09-2005, 06:32 AM
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bret bret is offline
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Boat: Prostar 190, 1994, 350 TBI 308hp.
Location: Heber Springs, AR
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Next to Sea Foam I would use Chevron Techron. This stuff is great for intake valves other carbon buildup.
1994 ProStar 190 Red/White, 350 Alan Tehan special
"PORSCHE, there is no substitute - except for my ProStar"
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Old 04-09-2005, 09:08 AM
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east tx skier east tx skier is offline
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Boat: 1998 Ski Nautique
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I've had nice results with Sea Foam.
Previous: 1993 Prostar 205

Red 1998 Closed Bow Ski Boat, Ford 351, 310 hp, Acme 4 blade, Perfect Pass SG.


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To me, this forum is about love of inboard boats. It is about the sharing of information and, on a good day, some humor. It is not about post count, brand of boat, or any other superfluous labels that lend themselves to a false sense of superiority. Please, respect one another, try to pass on accurate information, and keep your eye on the ball.
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Old 04-10-2005, 01:49 AM
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erkoehler erkoehler is offline
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I'd go w/ the sea foam!
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Old 04-10-2005, 12:32 PM
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NeilM NeilM is offline
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Join Date: Jul 2004
Boat: 2002 MariStar 210VRS 330hp Tower, Ballast, Bimini, 400w Clarion
Location: Calgary, Alberta
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I don't know... I know Sea Foam advertises itself for small 2-strokes, which a 200hp Yamaha definitely is not.

I'd be a little concerned that it might reduce the effectiveness of the lubrication.

The only additive I'd recommend is fuel stabilizer, without checking with Yamaha first..
2002 MariStar 210 VRS 330hp, Tower, Perfect Pass Stargazer, Bimini, Triple KGB Ballast, 400w Clarion XMD3, Bennett X-14 Wake Plate, 1000+ hours and still running great!

Life is not a journey to the grave with the intention of arriving safely in a pristine, well preserved body, but rather to skid in broadside, thoroughly used up, totally worn out, and loudly proclaiming "-- WOW--What a Ride!"
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