1970 85hp V4. Idles rough, seems to be only running on 3 Cyl until 3Krpm. Then runs<br />great. <br /><br />Cyl 1,2,3 plug damp when removed. Cylinder 4 plug is dry. Surface gap plugs. Good <br />spark on all 4.<br /><br />Compression is 115psi across the board.<br /><br />Engine runs worse with #4 plug out and grounded.<br /><br />Point gap set wider than spec cause it runs much better that way. About 2 clicks<br />(indexed screw) beyond .01<br /><br />#4 plug is not cleaned (as in water leak) just dry.<br /><br />I've pulled the low speed idle screws, cleaned em, sprayed carb cleaner<br />in the hole, and reset low speed idle. Plug still dry.<br /><br />Carb rebuild kit is on the way. Also new high speed jets are ordered.<br /><br />Am I correct in assuming dry plug == lean?<br /><br />I worry about running the points too far open, what am I risking?<br /><br />Thanks for your time,<br />Mike
, but I'll try it.<br /><br />Mike