how to check carb bypass valve's?

[hammer250v8]

4 of my 8 plugs are fouling out.<br /> i think there are valves to let unburnt fuel back to intake manifold. in the book it shows a syringe. do i need to remove them to check? wgere can i get a syrange to check with? thanks..james

 

[JB]

Re: how to check carb bypass valve's?

Moving to JohnnyRude Troubles

 

[93bronco]

Re: how to check carb bypass valve's?

if you are talking about a 250 - 300hp 90 degree LV, whats the year & hp?<br />you will have to remove the 3 line check valve, but the 8 recirc fittings can be left in for the check - as long as you can slide the hose over nipple.<br />i got my syringe from a pet store.

 

[hammer250v8]

Re: how to check carb bypass valve's?

it's a 1991 250 evinrude. do i just pulll the hoses off the valves and try to push alcohol throug the fittings? thanks

 

[93bronco]

Re: how to check carb bypass valve's?

what manual are you using?<br />-<br />cylinder side fittings<br /> remove hose, attach clear hose, syringe filled with- alcohol should move back and forth.<br />-<br />check valve/fitting<br />intake side (behind & sides)<br />remove hose attach syringe<br />1-press litely on syringe- alcohol should not move threw fitting.<br />if it does replace.<br />-<br />2-draw air threw fitting.<br />if you cant draw air replace.<br />-<br />the fittings also have little screens that collect debri, even if they are good doesnt hurt to remove & clean.