Decarbing

G

georgiaboy

Petty Officer 2nd Class
Joined
Dec 3, 2006
Messages
148
I want to decarb my Johnson in a few months and I want to do it right. As I remember I put a can of sea-foam in a gal. of gas and let it run through the motor as is -no more diluting. This is a 2005 motor 90 hp. Is this the right way??? Also if I am in the water how many rpms should I run??
 
tashasdaddy

tashasdaddy

Honorary Moderator Emeritus
Joined
Nov 11, 2005
Messages
51,019
Re: Decarbing

this is the way i do it.

Decarb, take a can of seafoam put 3/4 of it in the gas tank, with only 1 gallon of premixed gas. put the rest in a spray bottle. start the engine, and let it come up to temperature. then remove plugs, and them some real good shot of seafoam into the cylinders, replace plugs, let sit 15 minutes. restart, and spray the rest of the seafoam into the carbs, so the the motor almost stalls, wait and repeat until the seafoam is gone. and take it for a wide open throttle spin. it is going to smoke like a house on fire, during this process. then put in new plugs, ad premixed gas to the tank, take for a good run.
 
E

ezeke

Supreme Mariner
Joined
Sep 19, 2003
Messages
12,532
Re: Decarbing

I think that the motor has injectors. You might want to consider having them cleaned and flow tested.
 
tashasdaddy

tashasdaddy

Honorary Moderator Emeritus
Joined
Nov 11, 2005
Messages
51,019
Re: Decarbing

did some checking, your motor has fuel injectors also, so i don't know the proper procedure for them. my procedure is for the carbed motors.
 
R

R.Johnson

Rear Admiral
Joined
Sep 24, 2003
Messages
4,446
Re: Decarbing

Just run BRP carbon guard through the fuel as per directions on the container, this will take care of the carbon.
 
HighTrim

HighTrim

Supreme Mariner
Joined
Jun 21, 2007
Messages
10,486
Re: Decarbing

I use the BRP Carbon Guard as well, seems to work well. Seafoam is rare for us Canadians.
 
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