I pulled out this morning to head
from Charleston but didn't escape the marina.
I installed a new 30 micron primary filter last week. The system had an old Lucas water
separator but no filter in it. After bleeding the system I got it started and ran it for half an hour at the dock
. It ran well. After I pulled out I noticed that the rpm
would slowly cycle up and down 5-10%. 1200 RPM
to 1100 to 1200 every few seconds. I headed to the main dock
and the engine
quit as I approached. No damage done but I'm stuck until I get a mechanic
Could the erratic rpm be due to a loose hose connection allowing air into the system. Or could it be because the system is straining to draw fuel through the new 30 micron filter?
I'm suspicious of two things I did.
1. My advisor/helper struggled reconnecting one of the fuel
lines onto the secondary filter. I was concerned that it may be cross threaded.
2. To install the Racor
primary I cut the copper lines and put tight fitting diesel
rubber fuel line over it, using a pair of hose clamps to secure each end.