jwill19028
New Member
Good Evening,
I have a been working on a 1997 sportster for the past few months and have been recently testing it on the water. The carburetors are rebuilt and I am having problems with surging. I had a day where it ran fantastic (ran it for about an hour cruising around a lake) but the next day it kept surging and dying. I took apart the fuel system, (I don’t have any grey lines) made sure everything was clear, took apart the fuel selector, cleaned it out. I had the same problems with surging again. I then bypassed the entire fuel system today (including the selector) and ran it in the water off of a clean 5 gallon fuel tank. It ran well for about 15 minutes then began to surge again. While it was running well, I did a spark plug test, wide open throttle for about 2 minutes then pull power to idle and immediately shut off the engine. When I pulled the plugs it looked like it was running a bit lean (I’ll include a photo). Any thoughts on what my next step should be? Thanks!
I have a been working on a 1997 sportster for the past few months and have been recently testing it on the water. The carburetors are rebuilt and I am having problems with surging. I had a day where it ran fantastic (ran it for about an hour cruising around a lake) but the next day it kept surging and dying. I took apart the fuel system, (I don’t have any grey lines) made sure everything was clear, took apart the fuel selector, cleaned it out. I had the same problems with surging again. I then bypassed the entire fuel system today (including the selector) and ran it in the water off of a clean 5 gallon fuel tank. It ran well for about 15 minutes then began to surge again. While it was running well, I did a spark plug test, wide open throttle for about 2 minutes then pull power to idle and immediately shut off the engine. When I pulled the plugs it looked like it was running a bit lean (I’ll include a photo). Any thoughts on what my next step should be? Thanks!