Fuel lines

[Voyager1]

I have an ODay 302 with yanmar 2gm20f. Had to remove my diesel tank to run new hose for the head. With the tank out I replaced the fuel lines since the ones in did not look like marine grade. Changed both filters and filled them with diesel. Tried to use the lever on the pump to bleed the fuel lines. Pumped for 30 minutes with no luck. Had secondary filter bleed valve open. After hand pumping for 30 minutes I closed the tank valve and opened the primary filter. Filter was still full and did not drain back into the tank. If I am thinking right that should tell me that I don’t have a air leak from the tank to the pump. The previous owner said he would open compression leaves and start the engine to bleed the lines. I did not have any issue with the engine last year, boat is still in the yard. I am in Wisconsin so the boat comes out every year. If the fuel pump worked can the manual lever not. Any trouble shooting suggestions.

 

[All U Get]

Search bleeding fuel lines and make sure your seacock is closed if you’re using the starter to bleed each injector. You’ll need the firing order.

 

[DEB AND DION]

The fuel pump uses the camshaft to pump the fuel. If the cam lobe is up you will need to turn the engine 1 turn to move the cam so you can operate the pump. If the pri. fuel filter is before the hand pump you could have a air leak at the filter or the fuel line, or the fuel pump could be bad. My fuel pump lasted over 20 years when I replaced it.

 

[Voyager1]

My primary filter is above my fuel tank, if after 30 plus minutes of pumping, I closed the tank fuel valve and opened the filter up, filter was full, would that indicate I don’t have an air leak, if I had an air leak wouldn’t part of the filter drain back into tank. The primary filter is higher then the fuel tank. The lever seems to move ok, about an inch, but this is my first time using it. Do I rotate the clockwise or counter.

 

[Tally Ho]

Don’t crank the engine unless you close the water intake (and you should probably pull the impeller).

You can hydrolock the engine if you keep turning the engine over, pumping water through the cooling system, and it backs up into the cylinders.

Did you crack the bleed screw while you were pumping away on the fuel lever? Seems hard to believe that 30 minutes of pumping would not clear any air out of the line...it is not that far of a run.

Also, did you pre-fill the filters with fuel before closing them up? If not, that will require a lot more purging.

I changed my filters last year for the first time since I purchased my 1988 O’Day 322. I was a bit worried about it and bleeding the air out. I filled each filter housing before I put the filter in and closed it up. Never had to bleed it at all. Started right up and ran fine. Of course you will have a bit harder time since you replaced the lines...can’t pre-fill them.

Good luck! I see you are on Lake Michigan, so you have a short sailing season (like me).

Greg

 

[Voyager1]

I was thinking, when I connected my fuel line to the lift pump the pipe joint bolt moved. I reposition the hose and tightened the bold. I am thinking the bolt hole might be misaligned. Anyone ever align the bolt, is there any marking on the bolt? Not sure if this is the problem will check tomorrow.

 

[NYSail]

When using the pump make sure you are pushing lever fully down.... you can feel the pressure. And like was said before just hit the key to rotate engine if not working. Should only take a few minutes to get fuel moving.... not 30.

Good luck
Greg

 

[StargazerP303]

ODay 302 with Yanmar 2gm20f.
First thing I would do is get a suction pump $3.00 at the Dollar store, Kmart, Walmart. It's used to syphen fule or fluids from one container to the next.
1. Open fuel valve to supply the lift pump with fuel. DO NOT PUMP LEAVER
2. At the top of the small fuel filter, open and remove the BLEEDING SCREW.
3. Place the suction pump end at the bleeding opening and a bucket to drain into.
4. Now, Pump like hell till you see a lot of fuel going into the bucket.
5. Now put the screw back in and firmly
6. Put the throttle up 3/4 are up FULL and try to Start your engine. "IF YOU ARE IN THE WATER" shut off the water valve supplying water to the engine before trying to start the engine. Once the engine starts and runs Now, open the valve to allow water into the pump. Your engine doesn't need water to start it.
7 still no start bleed at top of High-Pressure Pump. Open a little the fuel line and crank just a little to get the air out.
Now same thing 3/4-start engine. ?? Start "No".
Get the maintenance Dept. guy to start it $45.00. Last time I was there they did mine.. $45.00