Finished engine swap in my 1750 XLV. It had a 2.4L XR4 which developed problems so i picked up another boat motor n trailer that has an XR2 150 which is the 2.0L motor. Only thing different with the engines is the XR2 was still running the oil injection. I bought the oil pump plug and now using premix. Everything worked as expected except the tach. I was wondering what feed the tach a signal. I thought it was the alternator and of thats the case i thought the tach should work. I took it for a test run this evening and only issues are the tach and the oil injection alarm. My question is shouldnt the wiring be the same on XR2 and XR4?