Sputtering Johnson V4 90hp - 1994

[racerone]

Agreed----Clean carburetors / jets are very important on a 2 stroke.-----Clean them and post the results here.

 

[Berdink]

Thanks racerone.
I always post back.
It's frustrating reading threads where someone asks for help and then disappears. Rude.

 

[Berdink]

I was planning on just blowing out every nook, cranny, orifice, jet, with spray carb cleaner.
.
Should I dip it in my Berryman's?
Doesn't Berryman's harm the outside finish on the carburetors?
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The only reason I ask is I saw a guy on YouTube (Brandon's Garage) do it. But his were pretty dirty.

 

[Berdink]

No, I will not be using Berrymans. It supposedly strips the finish.

 

[jimmbo]

Okay

Okay, you're of an older generation. Milk Bottle?
I remember the Milk Man and those cold glass bottles in that metal carrier and left on the porch.

Looking at it again, maybe it looks like a Decanter for Wine...

 

[Mc Tool]

Looking at it again, maybe it looks like a Decanter for Wine...

Ah yes , A nice chianti and some farver beans ?..

 

[Berdink]

Well, I feel better seeing the carbs need help.
.
Does these green colors mean water sat in the bowls for awhile?

.
The motor was laying on its side when I first got there, and then we hoisted it up and put it on stand to run it.

 

[jimmbo]

Those Tubes are Brass, and Brass is an Alloy containing Copper, which when oxidized by water, creates the Green Oxide. High Humidity will also cause that.

 

[Berdink]

It's interesting one side is dark goopy and the other side is dry green corroded. I'm guessing it was sitting on that one side for some time.

 

[Berdink]

Where do you guys recommend I buy under the cowl fuel line by the foot?

 

[Mc Tool]

Nappa ...or any other vehicle parts warehouse ....you can usually get good hose clips there too

 

[jimmbo]

I believe there is a USCG Cert required for any Fuel Line used in a Boat, so Auto/Truck Fuel Hose might not be Legal

 

[Berdink]

Yep,
Under-cowl fuel lines require USCG Type A1-15 marine-rated hose.

 

[Berdink]

Well, the motor sputters exactly the same. Exactly the same.
.
The carbs did need cleaning, as my pictures above showed. There was also a small amount of goop at the bottom of the bowl. They are spanking clean now. I pumped the bulb just to verify it wasn't the fuel pump. It runs exactly the same whether I pump the bulb or not.
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I tried turning the primer solenoid to manual on, and it ran worse.
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My spark tester came today, so I'll move onto checking that next.
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Just doing a process of elimination.
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Btw... I've been searching,and looking. I'm not finding the air/fuel mixture screw anywhere.
Did the 1994 Johnson 90hp V4 not have a air/fuel mixture screw on the carburetors?

 

[Mc Tool]

Yep,
Under-cowl fuel lines require USCG Type A1-15 marine-rated hose.

What a load of crap ....rules for the sake of it . Here in NZ any decent fuel hose has the standard it needs printed on the side and usually its intended use ....like fuel or vacuum , and us Kiwi's (mostly...we have dickheads too ) have enough common sense to not use wiper/washer hose for fuel lines . The last few lots of fuel line I bought came from temu or ali x , normal reinforced rubber for bikes and outboards and some silicon stuff for the chainsaw and carb drain tubes .
You guys are ridiculously over regulated ...Im sure its on its way here ....mostly so various depts can justify their existance.
We do have to have certification ( marine survey ) if your carrying paying customers but as far as the private guy is concerned ...nah

 

[Berdink]

Fresh non-ethanol gas mixed 50:1.
New Spark plugs gapped at 0.030 inches.
Runs the same as with the other tank of gas from before.
Runs the same as with the older spark plugs.
.
Right from the startup and warmed up. Runs the same.
.
I'll check spark with spark tester at 7/16.
Then I'll test each coil. Then the power pack(s).
.
Oh well. I'll keep chipping away.

 

[jimmbo]

Some people are always screaming about Red Tape, how it slows things down, and adds Expense, but those Rules and Regs are the Result of Boneheads who use whatever they think will Work, ignoring Common Sense if it doesn't match their Thought Process. Same goes for those who insist that there is NO difference between USCG Certs for Distributors, Carburetors, Alternators, and Starters and the Automotive Version.
In an Auto/Truck, if there is a Fuel Leak, the stuff ends up on the Ground, in a Boat, a whole different Story, including the Ability to get away from any Fire, or Potential Explosion

 

[jimmbo]

Btw... I've been searching,and looking. I'm not finding the air/fuel mixture screw anywhere.
Did the 1994 Johnson 90hp V4 not have a air/fuel mixture screw on the carburetors?

Looking at the Parts Diagram for your Carb, I would say the Idle Mixture is fixed and not adjustable.

 

[Mc Tool]

Some people are always screaming about Red Tape, how it slows things down, and adds Expense, but those Rules and Regs are the Result of Boneheads who use whatever they think will Work, ignoring Common Sense if it doesn't match their Thought Process. Same goes for those who insist that there is NO difference between USCG Certs for Distributors, Carburetors, Alternators, and Starters and the Automotive Version.
In an Auto/Truck, if there is a Fuel Leak, the stuff ends up on the Ground, in a Boat, a whole different Story, including the Ability to get away from any Fire, or Potential Explosion

Yeah I get all that jimmbo . Is the afore mentioned bonehead still allowed to fit his uscg approved fuel line himself ? Just that Im thinkin that its the fitting of the fuel line rather than the line itself thats likely to give rise to any safety issues

 

[Berdink]

Looking at the Parts Diagram for your Carb, I would say the Idle Mixture is fixed and not adjustable.

Yeah, that's what I suspected.
I'll go through the process of elimination on the ignition starting from the spark, to the coils, to the power pack