Greetings!
This is (hopefully) getting to the final chapter of my stalling/backfiring engine saga...
Last year my 2004 H190, Penta 5.0GL-E was giving me troubles accelerating: when opening throttle and accelerating the boat to above +3000 rpm (approximately), the engine was hesitating, it fails to gain power, and I hear what appears to be backfiring under the hood. If I back the throttle, most of the times the engine will recover; if I stay on it - the engine dies. Given the intermittent nature of the problem and the little time I had to get out on the water (:-() this last summer, I never made real progress on the issue. However, I did make real contribution to the dealer's bank account as I paid for various diagnostics the lead me nowhere, including a new low-pressure fuel pump, etc.
Last weekend I was working on the boat, and I was having hard time keeping the engine running, even out of the water and not under load.
I disconnected the fuel/water filter from the incoming fuel line, and connected it directly to an auxiliary fuel tank. Worked like a charm: the engine was running smooth and clean. So now I know the I have a problem somewhere between the tank and the fuel filter. The usual suspect: anti-siphon valve. After wrestling with the valve through the small access hole in the floor, I could not take it off. I ended up removing the 90 deg elbow with the anti-siphon valve, hoping I'll have better success working on a bench. Long story, but the valve sheared off, and I had a long fight with gentle drilling to remove the leftover aluminium from the elbow.
Now what I have is (1) a new siphon valve ordered, and (2) the old items as the picture below shows (I will re-use the elbow).
The bottom of the elbow (right edge of the image) was connected to a plastic pipe going into in the tank. How do I access the in-tank end of it? Is there a screen filter? While I'm down there, I'd like to make sure that nothing else is restricting the fuel.
Thanks in advance!
​Zevi.
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