Got the boat running like a champ again,thanks for going the extra mile to help me out…
Care to share the problem? Many here are running Yahamas.
Blown head gasket due to carbon build up,so if you are not doing a decarb evry 100 hrs you to can suffer the same …i have run 1000 oF dollars of ring free,big waste of money…you have been warned,i wish i had…
Also had to do balancers on both motors…
Boat runs like it has never ran before,saw 2.0 mpg at 27 28 mph in the ocean last weekend…boat motors can get to 6000 rpm now even fighting the current and wind in the harbor…
AGain do your decarb…
ouch - thanks for the tip. Glad you got it all put back together, bob!
At the risk of sounding dumb, what is the best and most effective way to decarb as a boat owner?
Key West 19’6" CC 115hp Merc
14’ Fast Craft w/ 60hp Merc
I second that viper !
Wicked fishing
175 CC Pioneer Bay sport
90 Yamaha 4 stroke
Decarbonizing:
Decarbonizing your motor breaks down existing carbon deposits in your motor. There are two ways of doing this.
First you can use a fuel additive like Yamaha’s Ring Free in “shock treat” quantities. This requires dumping a large amount (read the bottle) of this deposit remover/preventer into a specified amount of fuel.
This is generally the only way to decarb an EFI motor since you don’t have access to the throttle bodies. It is the most expensive way to do it but when weighed against the cost of a rebuild it’s a bargain…trust me.
The other way to decarb is to gain access to your carbs and introduce a cleaner like Mercury Marine’s Power Tune. First make sure that you have a water source for your engine. Then remove the cowl and remove any breather box that covers your carb throats. Start your water then start your motor. Raise the fast idle lever until you are idling at about 1200-1400 rpm. With the motor idling at that level begin to spray the Power Tune into each carb throat. Don’t touch your idle and let the Power Tune bog your motor down but don’t let it shut it down. Move quickly from throat to throat until you have used about half the can.
Here is a tip…don’t point your prop at anything that you don’t want to be black and sooty (i.e. the garage door or the wife’s new white car).
After you have put the Power Tune to it, shut the motor down and let it sit for about an hour. Then take it to the lake and run it wide open for about 3/4 of a mile. If going to the lake is not an option, restart the motor (with a water source) but don’t rev it over 1600 rpms on a hose. After decarbing, running Ring Free, good gas and a good TCW3 oil will limit deposits on a regular basis. I like to decarb a motor every year or every
100 hours, whichever comes first.
Thanks for the information!
One additional question, does this apply to four strokes as well. It sounds like it is mostly a two stroke issue. I have a five year old four stroke. Do I need to “decarb”?
Thank you!
ZX
Good question, Tank! I wouldn’t think it applied the 4 strokes. I’ve never decarbed 4 stroke lawn mower motor. Maybe run some in injector cleaner once in a while! A 4 stroke doesn’t carb up like a 2 stroke, because you don’t mix the gas.
it does apply to four strokes
they build up carbon almost as bad as a 2 stroke.
we see it every day.
rings stick, causing low compression, valves get dirty causing low compression.
valve stems get Dirty, and wear the seat, and cause low compression, and worse, the wear isn’t fixable with a decarb, and also oil burn.
mixing things in the gas is better than nothing, but spraying the foam directly into the intake does the best job
Thanks for the step by step instructions Easy!! Since I purchased both of my boats used and do not know their history, I think this will be a good project for this weekend. Where can I find Mercury Marine’s Power Tune?
Key West 19’6" CC 115hp Merc
14’ Fast Craft w/ 60hp Merc
we use and sell a product by valvtect called marine motor de-carb
its about $15 a can
quote:
Originally posted by chris Vwe use and sell a product by valvtect called marine motor de-carb
its about $15 a canwww.teamcharlestonmarine.com
www.joinrfa.org
Awesome, I will stop by on my way home from work and pick one up. Which side on I-526 are y’all on, the S-ville side or the Downtown side?
Key West 19’6" CC 115hp Merc
14’ Fast Craft w/ 60hp Merc
My pleasure! I just did a search on how do you decarb an outboard motor and what do you know! Thanks Chris V!