I have posted on this topic before but have not gotten anywhere yet...<br /><br />I have a new engine (4.3 Vortec) attached to my old Alpha One. I get a spark knock at about 2500 RPM when I get stuck in a trough and the engine is working REALLY hard. It runs great at idle up to 2400 RPM and...
I had a new Mercruiser engine installed. I now have a 4bbl Carter/Webber/Eldebrock AFB carb, Thunderbolt IV ignition, roller cam and balance shaft. It runs great but I'm getting some slight pinging from just above idle to about 2700 rpm. <br /><br />During an underway troubleshooting session...
I had my old 4.3L Mercruiser replaced with a new block with a 4 bbl carb and roller cam. I have TB IV ignition with the control module mounted on the distributor. The engine runs great and has lots of power. The problem is a light spark knock that occurs in the mid power range. I know it's...
I had my '87 4.3L Mercruiser replaced with a new block with a balance shaft, roller lifters and 4 bbl carb. I'm not sure of the exact configuration because it was a custom job done by a mercrusier dealer. I'm using my old transom plate. <br /><br />Anyway, it runs great but there is a VERY...
