Decarbonizing 1999 Johnson 175 Carb.

[Bigshrimpin]

Capt Chuck . . . I agree . . . maybe we can all pitch in a buck or two every month and have some Tech answer our questions!!

I've done this with Powertune and the Bombardier product. There's a write up on boat setup . . . I followed the FICHT decarb instructions (which is not with me any longer).

Here's a link to the Carb Version.
http://www.boatsetup.com/Decarb_Carb.html

But for my carb motors . . . I just followed the instructions on the can of powertune.
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On the Blown up Merc XR2 that I got for free . . . I tore it down and you wouldn't believe the carbon build up on the piston heads that eventually caused piston #5 to bite a ring and paint some pretty aluminum streaks on the cylinder wall. The carbon buildup was really thick (Looked like someone was cooking BBQ ribs on the grill). So . . . if your motor is still running . . . it's never too late.

Remember to clean off your plugs with some left over spray or replace them after you decarb.