Evinrude 175 Fuel Flow Problem

Need some help. I have two 175 injected motors on my boat. One is hard to start, and when you run, the bulb has to be constantly pumped in order for it to run right. After running for a couple minutes, the rpm’s will cut back. After you pump the bulb though, it will run perfect for a couple mintues until it cuts back again, etc. No problems idling. I’m thinking it’s a bad lift pump. Or could it be a high pressure pump, or something else? No leaks or loose connections observed in the fuel line. Advice?

lift pump

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Thanks Chris V. Appreciate all you do on here.