3.0 correct carb

[sgajan]

Ok heres what I have
1988 fourwinns
3.0 omc engine
Delco EST distributor ..not points So I am guessing the motor is newer or retrfitted.
The carb is trashed i think. I had a rebuild kit put in it but i am still running rich. Pump is fine and float is correct.
The idle mixture screws barely make a difference.
The guy that had this boat boogered everything he touched so i am suspecting the carb is worthless also. From all the pics ive seen of carbs for this year they look close but not the same as what i have. What I have is a Holley carb. And i cant find the correct numbers on it.
Anyways I see mercarb and rochesters look totally differnt to me.
I would like to know the correct model of carb to buy for this engine I have.
Different brands and numbers would be nice.
Budget is low
Thanks

 

[sgajan]

Re: 3.0 correct carb

I wanted to add this.
I have an inline fuel pressure guage it reads around 10psi at idle. Is this way too much? And if so WTH? bad pump cause high pressure?

 

[zbnutcase]

Re: 3.0 correct carb

Yes 10psi is too high for a carb, should be 4-7psi

 

[sgajan]

Re: 3.0 correct carb

This is confusing. Im not finding any info on how the pressure gets to be too high on this pump

 

[shimano]

Re: 3.0 correct carb

I own a 3ltr omc.Last year it was running super rich and I tried lots of things to no avail,I finally figured out that the spark arrester on the top of the carb was plugged ,it looked fine,but when I cleaned it with brakclean spray ,you should have seen the crap that came out.Made all the difference in the world.

 

[sgajan]

Re: 3.0 correct carb

Yeh they do get plugged but still look clean. I clean mine all the time. Thanks for the idea.