Neighbor has a '95 60 HP Evinrude. It has electric start and injection oil. The last couple of times he used it he had trouble starting once he left the dock and had to tow it in. After sitting afew days he tried it and it starts and runs fine. Next time he uses it it starts and runs fine and for half the day and then does not start. He says the warning buzzer for the oiler has at times (since he bought it) sounded and he would pump the oil bulb or button on the oil tank and the buzzer would stop (not out of oil,just not getting enough until the bulb or button is pumped. Where should he start looking??? Thanks for any help