- May 14, 2008
- 3,541
- Boat Info
- 1988 390 EC
- Engines
- 454 Mercruiser Gassers
I am having difficulty starting my older 7.4 l. gas engines this year. I have to pump the throttles several times and crank the engines over for quite a while before they start. After that, they start right up as soon as I turn the keys. Are my 30 year old fuel pumps just getting tired or do I just need some sort of anti-syphoning valve installed to keep the fuel in the carbs?