Drothgeb
Member
- Messages
- 2
- Reaction score
- 0
- Points
- 10
- Boat Make
- Other
- Year
- 2021
- Boat Model
- Other
- Boat Length
- 22
First time posting here, hope you guys can help.
So I’ve got a 2021 custom built bass boat with a Rotax 250 hp in it. I took it out last week week, and was getting surging and a bad miss. In checking the codes, I was getting P300, P301.
First thing I checked was the plugs, they looked good. But I changed the location of the plugs and coils to see if it made a difference, same thing. After that I inspected and switched the injectors around to see if that made a difference, still got the same codes. But, I don’t have a BUDS to erase the previous codes.
After all of that seemed to check out, I checked the fuel pump pressure. Per what I could find in the service manual I found online, it should be 56-60psi. In checking it with the engine off though, I only had 36-38psi. Since the symptoms seemed to match low fuel pressure, I bought a new OEM pump. But now after installing it, I still see 36-38psi.
Obviously, something else is going on here. Battery is full, so that shouldn’t be a factor. I’m pretty experienced at working on gas and diesel engines, outboards too. But no experience working on a Rotax. I considered buying a BUDS. But considering the cost for the device and license, I’d rather not. Anyone have any ideas?
So I’ve got a 2021 custom built bass boat with a Rotax 250 hp in it. I took it out last week week, and was getting surging and a bad miss. In checking the codes, I was getting P300, P301.
First thing I checked was the plugs, they looked good. But I changed the location of the plugs and coils to see if it made a difference, same thing. After that I inspected and switched the injectors around to see if that made a difference, still got the same codes. But, I don’t have a BUDS to erase the previous codes.
After all of that seemed to check out, I checked the fuel pump pressure. Per what I could find in the service manual I found online, it should be 56-60psi. In checking it with the engine off though, I only had 36-38psi. Since the symptoms seemed to match low fuel pressure, I bought a new OEM pump. But now after installing it, I still see 36-38psi.
Obviously, something else is going on here. Battery is full, so that shouldn’t be a factor. I’m pretty experienced at working on gas and diesel engines, outboards too. But no experience working on a Rotax. I considered buying a BUDS. But considering the cost for the device and license, I’d rather not. Anyone have any ideas?
