4.3 timing and popping

[tordway]

Here goes, I have a 91 4.3 mercruiser. Just replaced pistons and had heads redone. All back together and trying to set timing and carb is popping. I also just found out I need a new coil. Could a bad coil cause the popping and make it difficult to set timing?

 

[Bifflefan]

Re: 4.3 timing and popping

Id say thats a fair bet. setting the timing is the last step, when the ign sys is in good working order.
Also recheck the firing order

 

[Don S]

Re: 4.3 timing and popping

What is your problem with setting timing. Popping could be caused by lean carb, wrong firing order, mis-adjusted valves, cracked cap, and a number of other things.