transcorpiboats
Cadet
- Joined
- Oct 20, 2016
- Messages
- 10
I have a 1982 23' I/O with a Mercruiser 260 and Alpha One I/O
I recently replaced the OEM carb (Rochester Quadrajet 4BBL) with a rebuilt one from National.Carburetor.
My mechanic has it working OK except for an issue with the secondaries. We suspect there is an adjustment needed there because when going from idle to WOT there is hesitation, flat spots and an intermittent "Knock", which occurs at higher rpm's (I'm attaching a video which outlines the problem. If you listen closely the intermittent "knock" can be heard. I'm more concerned with that than anything else and would like to know what it causing it.
http://www.transcorp.com/AutoIndex/HTML/IMG_1870.3gp
I recently replaced the OEM carb (Rochester Quadrajet 4BBL) with a rebuilt one from National.Carburetor.
My mechanic has it working OK except for an issue with the secondaries. We suspect there is an adjustment needed there because when going from idle to WOT there is hesitation, flat spots and an intermittent "Knock", which occurs at higher rpm's (I'm attaching a video which outlines the problem. If you listen closely the intermittent "knock" can be heard. I'm more concerned with that than anything else and would like to know what it causing it.
http://www.transcorp.com/AutoIndex/HTML/IMG_1870.3gp
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