1987 200hp jet identification

[toybuilder039]

On a 1987 200hp which jet controls idle air/fuel mixture? Top or middle? Mine is running rich plugs wet at idle. And does bigger jet = leaner fuel mixture

 

[V153]

Top. Last I checked bigger jet equals more of everything: Air & fuel?

 

[boobie]

Lower one is for idle. Top is for intermediate. A bigger jet equals less fuel (leaner, more air). For a bad idle on that motor you may also want the check the recirculation valves. There's a procedure in the factory service manual. Been there.

 

[V153]

Hmm?

 

[toybuilder039]

Thanks guys I have checked the recirculating valves. And replaced 3. Seemed to help some but the lakes I typically fish at are idle speed only and tired of this thing loading up. Going to try to drill out jets.

 

[V153]

Going to try to drill out jets.

DON'T do that. Jets are cheap.

 

[boobie]

If you have the right drill bits you can do it. Jets are about $10.00-$12.00 apiece

 

[toybuilder039]

I fiqure it's worth a shot worse case is I would have to by 6 jets. Think I'm going to try to go up .010 and see if it idels better

 

[V153]

It's your motor.

'Magine if'n ya had a jig rigged up & a good drill press. And good sharp correct sized bits. Ya might could get away with it.

But we're talkin 1/100"?

Boy I dunno. Let us know how it works out.

 

[toybuilder039]

I think I can handle it do tool n die for a living

 

[Faztbullet]

Jets are not drilled!!!! Drilling can leave swirls in the brass and actually change the flow of jet, jets are reamed to size...