have a 93 johnson 60 hp J60TLETD with VRO. My shop manual shows that an air leak in the fuel pump diaphram can cause wet plugs, air getting into system that can cause difficult restarts, as well as dying at low throttle (fuel starvation symptoms). These exactly describe the 'ghosts' I've been chasing for the past year.<br /><br />I'm confused with the VRO equipment since the manual discusses this system as a fuel and oil pump. My question is simple. Does the combo fuel and oil pump contain the diaphram that can get a pin hole in it resulting in air leak into the fuel system? In the manual, there's a picture of a fuel pump filter screen and such that is clear, but no picture of the VRO combo fuel/oil pump with a similar diaphram.<br /><br />One other thing, are the low speed mixture screws suppose to be set at all the exact same turns? I noticed my top carburetor was opened slightly more than the bottom two which would be giving me a richer mixture; right? Could this also be causing my above symptoms? My top spark plug has always seemed to be more oily/wet than the bottom two.<br /><br />any help would be appreciated.<br /><br />p.s. I did a search on the VRO and read the outside link about the myths of the VRO and also viewed that diagram as well. I'm trying to figure out if my pump contains a diaphram that could have developed a pinhole causing the problems listed above.
