SoCal Jet Boats
Tech Talk => Jet Pumps => Topic started by: fstdraw on September 03, 2019, 08:06:21 PM
-
Hello Gents,
Two small problems that have me perplexed.
BBC, open cooling system, JE pump, OT headers water cooled,
First, I'm having problems getting the engine to prime with water when I start the boat lately. Engine fires but pegs hot before the water begins to flow out the water exit at rear of boat. Never been an issue before. I've run a wire to make sure the water intake at the jet pump is clear. Lines are two years old. The "T" to both the headers and the engine seem free of rust and crap. Seems only when I undo the hose cap (for hooking hose to run in driveway) and burping it there does the boat finally get water thru the system.
Second, I took out the electric fuel tank switching unit (lets you use left or right tank), and now the tanks won't drain at the same rate. I'm worried I'll be sucking air when the one tank is drained of fuel. Why won't the tanks drain at the same rate? One is nearly empty and the other appears full.
Thank you fellas!
-
I'm sorry but I can't be of help with the cooling, too many unknowns. but I know the "why?" to your second question. The fuel is sucked out of the top of the tanks (via a tube to the bottom) and unless every aspect of the left and right side of the fuel system is perfectly symmetrical, they'll never burn evenly. If they were Teed together from the bottoms of the tanks, it'd be a different story. As it is, if one side has a longer run to the tee or a higher maximum elevation in the line routing, that tank will always burn last/slowest. You're basically stuck with needing a selector valve of some sort.
-
Hook the hose up and disconnect the hoses in the thermostat housing and see if u get water out of them . It’s possible that u have sand In ur block and is restricting water flow , another thing to look at is ur freeze plugs , pull them and flush . Trust me I have seen this soooooo many times . Good luck
Sent from my iPhone using SoCal Jet Boats
-
Problems solved I guess.
I just went back to the fuel tank switching system and it seems to work fine. Just like it always has.
I am getting an air lock or bubble at the pump and it's not letting H2O into the engine unless I "burp" it or let the boat sit in the water a bit. At least I know what the problem is and can counteract it.
Thanks for the good ideas!
-
Problems solved I guess.
I just went back to the fuel tank switching system and it seems to work fine. Just like it always has.
I am getting an air lock or bubble at the pump and it's not letting H2O into the engine unless I "burp" it or let the boat sit in the water a bit. At least I know what the problem is and can counteract it.
Thanks for the good ideas!
First couple of times I went out after installing my Bassetts mine did this. I had to manually bleed the water neck, it solved itself after two or three trips, not sure what the issue was.
-
You need a air bleed valve on top of pump
Sent from my XT1635-01 using SoCal Jet Boats mobile app (http://r.tapatalk.com/byo?rid=201)
-
As soon as it starts, rev it up a bit to purge the pump of air. I back in to just before the point of full flotation and then start it and goose it to prime the pump. It primes faster with the reverse gate open.