Blueghost924
Petty Officer 1st Class
- Joined
- Sep 19, 2013
- Messages
- 250
Re: Spark plug wires on correctly?? - Mercruiser 470 3.7 L
Thanks for the help. I did some quick checks this morning, including a compression test, and came up with this:
#1 - 121 psi
#2 - 127 psi
#3 - 120 psi
#4 - 132 psi
I also grounded the spark plug for #2 and #3 against the engine block, turned it over, and saw a faint blue spark on each (which may not be enough). After I run a purple bypass wire, I'm going back to the original thread subject and make sure I wire the dizzy cap in line with the rotor and #1 TDC compression. I think B-Doctor was onto something in that making sure I'm at the "compression" point of #1 TDC, and not the exhaust stroke. On each spark plug, I do smell gas traces.
The way I see it, having decent compression on the cylinders gives hope for troubleshooting the rest of the engine systems!
Thanks for the help. I did some quick checks this morning, including a compression test, and came up with this:
#1 - 121 psi
#2 - 127 psi
#3 - 120 psi
#4 - 132 psi
I also grounded the spark plug for #2 and #3 against the engine block, turned it over, and saw a faint blue spark on each (which may not be enough). After I run a purple bypass wire, I'm going back to the original thread subject and make sure I wire the dizzy cap in line with the rotor and #1 TDC compression. I think B-Doctor was onto something in that making sure I'm at the "compression" point of #1 TDC, and not the exhaust stroke. On each spark plug, I do smell gas traces.
The way I see it, having decent compression on the cylinders gives hope for troubleshooting the rest of the engine systems!