wynjim55
Regular Contributor
I have a 2 cylinder Mariner 55hp (Japanese Mariner) and I'm concerned about the fuel line I installed since rebuilding the carbs. I have a 3/8" (10mm) fuel hose from the tank through the primer bulb to the outboard connector, then I have 3/16" (4.6mm) hose from the connector through the strainer, pump, tee piece and to the carbs. Is this right or should it be a larger diameter? Seems to nicely fit the barbs of the connector, strainer and pump. I replaced the plastic tee piece with a brass one as the hose I fitted wasn't very flexible and the plastic one didn't seem to fit good (too tight). Could this be a problem in any way? I am experiencing rough idle and stalling when trying to get under way, once rolling there is no problem. I've previously rebuilt the carbs and was running an inline canister style water separating fuel filter. I removed the filter yesterday but I haven't had a chance to run it since. I also found one of the air box mounting bolts had fallen into the throat of the lower carb. I managed to drag it out with a magnetized metal rod. I picked up an inline fuel pressure gauge but I'm having difficulty sourcing a tee piece to suit a 1/8" NPT male gauge and 3/16" hose, I'm sure I'll pick one up tomorrow when all the local stores are open again after the weekend. Any and all help gratefully accepted, thanks again in advance.
