As discussed in a previous thread I am replacing a Holley 600 cfm marine 4160 vacuum secondary carb with a Barry Grant Marine Demon 650 cfm vacuum secondary carb. I have read many complaints online about quality control issues with the Demons. I went through the carb and found the following problems. The accelerator pump cam lever needed a bend to line up with the pump lever. Many screws loose. A screw that holds the vacuum secondary canister to the main body was missing.
One of the fuel bowl screws was cross threaded at the end and required a tap and die treatment. There was no lube on any of the wear surfaces such as the accelerator pump shaft and plastic cam. The carb was totally void of any grease or oil. The jets were too tight to remove by hand using the proper jet tool. The secondary linkage is too loosely made, it flops around. The carb came with no throttle link or air cleaner stud. This stuff is not a deal killer for me because I grew up with Holleys and can easily spot problems like these and fix them with my bin of parts, but what if someone who knew nothing about this stuff bolted that carb up as it came? The secondary would not work and the accelerator pump linkage would eventually slip off and fail. Rather ironic that the carb came with an inspector's name or ID on it. I could have prepped that carb better at age 16. The quality of the the main body, fuel bowls and metering blocks appears superior to Holley. I have not finished the install as I'm working out the linkage and relocation of the ignition coil, circuit breaker, and solenoids. I hope they did better on the insides that I can't see. Some people said I should have gone with a Holley, but they don't offer a carb of this style and size in marine configuration. I'll post an update when it's runnin if I survive the engine fire.