How often do you decarb???

[albass]

Wondering how often you have to decarb a motor if you use an additive all year long???

 

[tashasdaddy]

Re: How often do you decarb???

every 2 years, just to be safe.

 

[Dhadley]

Re: How often do you decarb???

How often depends on how much coking (black carbon) is building up. Coking is related to a combonation of things from fuel to set up to ring type to combustion temps. The higher the combustion temp is, the quicker it'll form to the point of breaking a ring.

We've seen coking form and break rings in as little as 19 1/2 hours. Performance motors (not necessairly race motors) rarely, if ever, form coking.

If your motor is set up so wot, with an average load, is in the upper part of the rpm range, you use the correct spark plugs and run the correct octane you might not ever have to decarb.

If you're lugging the motor you might have to decarb a lot.

 

[iwombat]

Re: How often do you decarb???

I do mine as a part of winterizing. Toss in some fuel stabilizer with the seafoam (not exactly necessary, but doesn't hurt) at the end of the year and it'll be good when you take it out again next spring.

 

[ezeke]

Re: How often do you decarb???

I'm with those who follow the BRP maintenance schedule and do a full de-carbon treatment every year or 100 hours, whichever comes first.

http://www.evinrude.com/en-US/About.Us/FAQ/Maintenance.htm#Q1

If you want the maximum life from your outboard, follow the chart and use a carbon treatment in the fuel all of the time as well: http://www.evinrude.com/NR/rdonlyre...55-6BC1C69789FB/0/em_maintenance_schedule.pdf