- Jan 25, 2011
I’ve had this engine now going on two seasons. It has always had and has starting issues. It starts immediately and runs for about 30 sec and either dies or falters. If it falters, it will soon take off and all is well. If it dies, it will start immediately and all is well. The whole fuel system was replaced when the engine went in. I have pulled the fuel line off the tank and pressurized the line, racor, electric fuel pump, up to the plugged end of the line removed from the mechanical lift pump. It holds pressure well with no bubbling. The electric fuel pump helped it a lot. This is now happening about 1/3 of the time. Amongst my saildrive issues with Beta, I discussed this with them. I was told to turn the fuel pump on first before starting. If this alleviates the issue, then the problem is in the routing of the fuel return line back to the tank. So, I have been hitting the start button very momentarily before engaging the glow plugs and starting. This wakes the whole system up and pump starts ticking. No key switch. All buttons.. This procedure is working well. I cannot push the start button fast enough and it is immediately running at the correct speed depending on the throttle setting. No coughing etc. So, Beta says I need to route the return line from the engine down to below the bottom of the tank and then back up to the top of the tank. The tank has a “pickup tube” for the return. I can disconnect the fuel line and blow bubbles in the tank. SO... the big question is why would it be important for the fuel line to get below the bottom of the tank before routing back to the top? Beta says this is very indicative of this issue. I am failing to understand the theory behind this. When the engine stops, the injectors are closed and takes 2500psi to open them..why is this affecting the return line and why would the status of the return line determine the starting ability? If I reroute, I can get about 4” below which is about 7” lower than current. I would have to route in a narrow place and through to 90s to do a 180 back to the tank. The two 90s would be the lowest place and start dangling into the deep bilge. I don’t necessarily like fuel connection out of sight...