Help please! Johnson FD-21R 67 20 hp.

[Dawson130]

Pulled the flywheel off and replaced wires and plugs, cleaned contacts. Entire ignition system looks brand new. It is hard to start and when it is running the fuel smell is really rich and will only stay running in fast position. The odor is so strong within 30 seconds of running my eyes will start to burn because of the fuel. Is this just a carb adjustment? Any info is appreciated!! I

 

[lindy46]

How is compression? What have you done to the carb? If it has good compression and spark, I'd check the carb next. Probably needs cleaning/rebuilding.

 

[racerone]

Maybe the fuel pump in dumping fuel into the engine !

 

[Dawson130]

So should I just replace the fuel pump then. I haven’t messed with the carb at all

 

[racerone]

I like the idea of inspection and testing.----If the bulb goes hard then the fuel pump may be OK.----But I am not there to guide you.----I would never rush out and buy a new pump without inspection.----It may just need a $5.00 diaphragm !!

 

[oldboat1]

may not apply in your case, but really, really old fuel smells really, really bad....

Think a 50:1 mix/ratio should be fine on your '67 (about 2 1/2 oz. per gallon). For the carb air/fuel mix, the idle needle initial setting is 1 1/2 open, and may run best on a leaner setting (clockwise). The high speed jet on the bottom needs to be squeaky clean.

 

[Dawson130]

The only adjustment I see on the carb is the lean or rich adjustment on the front of the motor. Should I take the carb off and just try to clean it and inspect the bowl and such

 

[Dawson130]

Also if I need to transport the motor is it ok to lay it on its side or not?

 

[jasper60103]

Also if I need to transport the motor is it ok to lay it on its side or not?

Yes, but not on the side with the shift handle.

 

[lindy46]

If you take off the carb to clean it, I would get a rebuild kit and do the job right.

 

[Chinewalker]

Confirm that it is running on two cylinders - if one cylinder isn't firing, then it'll dump its unburned fuel right in the drink...

 

[Dawson130]

Where can I get a full rebuild kit for it?

 

[racerone]

There are different pumps that will work / fit on your motor.---Nobody knows what pump you have.-----Post a picture of your pump.-----Even making / cutting a diaphragm is easy.

 

[lindy46]

Where can I get a full rebuild kit for it?

A carb kit? Get it right here on Iboats:
https://www.iboats.com/shop/boat-mo...fuel-parts/sierra-18-7043-carburetor-kit.html
If you want a kit with the float, you need a BRP 439071. Not sure if they have that here.