1988 Force 85HP, what diameter fuel line should I be using. I had 5/16 but when I went to replace it the local marina mechanic gave me an anti siphon valve for the inboard fuel tank(had a quick disconnect on it), 3/8 hose, primer bulb and all new fittings. Now I have issues with motor not wanting to run at WOT for very long before dying out(primer bulb will be soft). I had added a water separator filter a couple of years ago. I have cleaned carbs and reset them using the very good guidelines I found on this forum. I have a tach on order from I boats to make sure my idle rpm is set correct. All cylinders have spark and compression is #1-135, #2-135, #3-140, this was before I ran some seafoam deep creep thru carbs. I also have replaced the fuel pump diaphragm. Thank you or any assistance.