Good news! When I tried it on the lake today, the boat ran well all the way to full throttle. Last time out, I had established that the reason the boat would not get up on plane was the choke jamming partly closed. But even with the choke fully open and the boat up on plane, the engine would...
No, I was going to check the fuel pressure today, but by then the engine was warm and I did not want to start undoing fuel lines and risk spilling fuel on the engine. I did have a couple of fire extinguishers handy but would rather not have to use them.
Here's a video of the boat running on the...
Here's another update. We tried the boat in the water again today and discovered part of the problem. The automatic choke would not open all the way, which accounts for the gas smell and lack of power to get the boat up on plane. When I held the choke open (with someone else operating the...
A few more questions for those with experience with the mechanical fuel pump 4.3 engines. I now have a replacement fuel pump, but before installing it, I want to test the fuel pump pressure.
Where and how should I connect the fuel pressure gauge? It has a plastic hose and various fittings...
Plug wires crossed my mind. Although they look perfect, I realize that there could be internal damage.
Since the performance worsened a lot after messing with the fuel pump filter, I do suspect that the issue is fuel related. My approach is to change one thing at a time; right now I'm...
Unfortunately, no good news to report. With new premium fuel in the tank, water absorbing (non ethanol) additive added to fuel, stone filter reinstalled in the fuel pump, tried it in the lake. No improvement. It's still not running even as well as before I took that fuel filter out of the...
Thanks for the ideas and the welcome. CaptKingfisher - sorry to hear that you lost sleep over this, but thank you. I also thought about it during the night.
Since I haven't had a chance to pick up a new filter for the fuel pump yet, I cleaned off the tiny bit of visible dirt on the original...
We have a 1992 SeaRay 4.3 litre that we bought new. Only used in fresh water, garage kept, and low hours, it always ran great.
This year the engine began to develop issues at higher rpms, missing or even backfiring at speeds above 30 mph. So I kept it below that. Now trying to fix it...
