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Different Carburetors for 70 HP

R

rude70

Contributing Member
Hi I have two 1977 70HP Evinru

Hi I have two 1977 70HP Evinrudes both 70773S. THe one that I have rebuilt has carbs stamped with 323707 and have a screw on the top housing at next to the plug/leadshot of the idle passage. The other motor has carbs stamped 322292 which do no thave these screws. I plan to rebuild the 323707 - does anyone know the difference/which are the correct carbs?
Also does anyone have the link to Joes guide to rebuilding carbs? Thanks
 
"Thanks jwb, i have attached t

"Thanks jwb, i have attached the photos showing difference! The BRP parts online drawing show the one without the screw! I beilieve that the carbs are the same for 70 & 75hp for around 76 to 78! Any ideas what the difference is or which are the correct ones? Thanks
294969.jpg
323707 with screw"">
294970.jpg
322292 - no screw
 
"the one w/the screw plug,..is

"the one w/the screw plug,..is,at least,on a 79 70,..i would use the others,that dont have the screw plug."
 
"Hi jwb thanks for the recomme

"Hi jwb thanks for the recommendations. I checked on BRP catalogue and yep they are from 79. I have rebuilt (new 030 pistons rings etc) my '77 (year from serial no. on plate), but looks like it has 79 carbs. Did not initially do the carbs since I new they worked and it was my first rebuild. On the water it idled fine chugged a litte at low speed but ran well at 2000 - 2500 rpm (still running in). So am now rebuilding carbs. I will rebuild the "non" screw ones, but what is the difference between the too?
Thanks"
 
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