Removable jets

[eula30]

does the removable jets, do they have to do with the motor idle ruff and having to much fuel on the carbs? You can see the top carb. spiting out fuel at wot? Runs fine at wot but will run ruf at idle (1986 90hp evinrude) S/Plugs gap .30<br />Thank you

 

[alumistar]

Re: Removable jets

usually it is the low speed idle setting screw that decides idle. in all the way and then backed out 1 and quarter to 1 and a half turns is usually the norm.

 

[eula30]

Re: Removable jets

Hi there, the low speed idle setting screw where is located? <br />Thank you

 

[alumistar]

Re: Removable jets

I believe it's on the front of the motor, about midway down. Do you have a tech book or manual?

 

[eula30]

Re: Removable jets

I do have a Clymer evinrude/Johnson outboard shop manual 48-235hp 1973-1990 . But I can find the low speed idle setting screw anywhere in the book.

 

[alumistar]

Re: Removable jets

Is your motor a 2-stroke? If it is, then there is most definitely a low speed idle screw about midway down on the left front side of the motor, I believe. Ya gonna have to look a bit for it. What the thing does is: It's basicall a metering rod that looks like a real thin pencil sharpened down to a point. When you screw it all the way in, be sure to only use your fingers. You DO NOT want to over tighten. Just enough to be slightly snug. Then turn it back out 1 and a quarter to 1 and a half turns. Sounds weird, but Holley, Weber, Carter, Edlebrock are that way. I know, those are for cars, but, they are really just more complicated versions of 2-stroke carbs. Same rules still apply though. I did it on my '65 'rude 9.5hp and a late 70's Merc50hp. It worked totally cool. It just seems that rules of engineering say it's true for all carbs 2 or 4 stroke. Boats,cars, bikes, dunebuggies and all.

 

[eula30]

Re: Removable jets

Motor is 2-stroke, Is the low speed idle setting screw in the motor or on the carburator, I know the 15hp have the idle screw right on the front of the carburator but I can see it anywhere on this motor.<br />Thanks

 

[alumistar]

Re: Removable jets

It should be on the baseplate of the carb. could be behind a screw plug in the body of the carb. you'll have to look close. There has to be one. they were only really done away with when fuel injection was introduced.

 

[Dhadley]

Re: Removable jets

The 1971 V4 E/J was the last V4 to have adjustable low speed jets. Your 1986 V4 has fixed low speed jets.

 

[eula30]

Re: Removable jets

Hi, is there any way that I can fix this idle situation? or I will have to buy a new carburator? also if I gap the S/Plugs at .35 do you think that will help?<br />Thank you

 

[eula30]

Re: Removable jets

??????

 

[Dhadley]

Re: Removable jets

Start with the basics. Do a compression test. That will tell if we have a solid base to work on. If the carbs have not been cleaned completely in a while do that too. <br /><br />Your first post is a tad confusing. Are we looking at a rough idle situation or fuel coming out of the carb throat at WOT or both?

 

[eula30]

Re: Removable jets

Hi, I did a compression test and it was 130 psi on all 4 cylinder, what I have is both rough idle situation and at WOT top carburator will spit fuel, Carbs was rebuilt 2 weeks a go.

 

[eula30]

Re: Removable jets

Any Idea how much a new carburator will cost?

 

[Walker]

Re: Removable jets

Spitting fuel is a symptom of a reed not sealing properly.

 

[eula30]

Re: Removable jets

I did test the motor today, I change the propeller I used to have Aluminum propeller now I got Stainless Steal II propeller, Motor ran fine all day and I can idle all day also. Now what I notice was with the new propeller motor will take time to come out of the hole and will not past 4500 RPM but by gps was going 32MPH witch is the same speed that I was getting with the old propeller the difference with the old propeller was the motor will rich 5200RPM. Now my question: How can the motor rich 5000rpm with the new propeller or I should leave like that?