arks
Lieutenant Commander
- Joined
- Nov 7, 2002
- Messages
- 1,977
My Silverton has twin Crusader 270’s (350 Chevy small blocks). The port carb (quadrajet) was acting up so I bought a rebuilt one from an established shop. My plan was to install the new one and rebuild the old one over the winter for use as a spare.
So the new carb went on without any problem, and it runs perfectly when cold. However, when it warms up it starts idling rough and eventually dies. Talked to the rebuilder and he told me to check the fuel pressure because the carb is setup for a maximum of 5 PSI.
So I put gauges on and it measures 10-12 PSI. It has the typical mechanical fuel pump mounted to the block but there’s no way to adjust the pressure. Funny thing is this engine was running fine with the old carb- I replaced it because the carb body had developed leaks at the mating surfaces and was unsafe. I looked at those cheap automotive adjustable fuel regulators but they have a maximum input of 7 PSI, not to mention they’re not marine rated. Haven’t found anything else that would be appropriate for my application. I suppose I could replace the fuel pump but that, to me, seems like it might not solve this problem.
Anyone else have any better ideas?
So the new carb went on without any problem, and it runs perfectly when cold. However, when it warms up it starts idling rough and eventually dies. Talked to the rebuilder and he told me to check the fuel pressure because the carb is setup for a maximum of 5 PSI.
So I put gauges on and it measures 10-12 PSI. It has the typical mechanical fuel pump mounted to the block but there’s no way to adjust the pressure. Funny thing is this engine was running fine with the old carb- I replaced it because the carb body had developed leaks at the mating surfaces and was unsafe. I looked at those cheap automotive adjustable fuel regulators but they have a maximum input of 7 PSI, not to mention they’re not marine rated. Haven’t found anything else that would be appropriate for my application. I suppose I could replace the fuel pump but that, to me, seems like it might not solve this problem.
Anyone else have any better ideas?
