Hello, my father was an outboard mechanic all his life and always knew what to do. He's passed now so I don't have the teacher to spin around and ask a question. This 25 2stroke mercury won't fire up and I need help. Gas is hooked right to the carb and is getting LOTS of it, when I put my hand or a napkin over the throat it floods instantly but that's the only way I've gotten it to start and scream ever w full warmup lever. The lever advances timing so I disconnected that and just tried moving the cam forward but no. Spark checker showed what looked like intermittent spark on #2 so I put a new coil on, checked fine. I grounded the plugs to the case to see if THEY sparked, and do. I can't tell if there's water getting to the cylinders bc the plugs are brand new and won't run long enough to see if they'll get dirty nor does the head come off to expose and look at the cylinder walls, the pistons come out of the opened case. When I cleaned the carb I looked in to see the reeds, they're clean looking. I've rebuilt the starter and its spinning fast enough and drawing properly. It just has to be some fuel issue in the engine right? Is fuel not getting passed the carburetor and that's why it floods so quickly when I try to air choke it with my hand? There's no other choke on it to activate. I pressed the blue enrichment plunger down trying and put my finger on the little vent hole by the idle adjustment screw also.
Oh 125 compression both. Vented tank. Safety switch works (e.g. spark). I'm pretty certain these are the right plugs. They are for a wide range of the 90's motors BP8H-N, gap is .037. I'm out of ideas have you got any clues?
Oh 125 compression both. Vented tank. Safety switch works (e.g. spark). I'm pretty certain these are the right plugs. They are for a wide range of the 90's motors BP8H-N, gap is .037. I'm out of ideas have you got any clues?
