Looking for advice. I'm helping a friend who has a D17 that, as I understand, has new pistons and sleeves and a valve job done as the engine was getting weak. Prior to the work it ran decent but smoked. Upon reassembly it will start pretty decent but the RPMs surge, it smokes bad and floods out. We went through the carb, verifying ALL passages are clean. Installed a new float and set the height to spec. The only issue I saw with the carb is the needle jet that the fuel mixture main screw threads into is dinged up where you'd put the screwdriver and the needle would pass into.
When running the engine will surge, and cannot be controlled manually with the governor lever or when disconnected from the gov. From idle to WOT it more or less does what it wants. We can impact the air fuel mixture enough to make it lean backfire. He says the intake manifold is new. We verified good compression (118-122) on all cylinders. Also to note is raw gas will actually leak from the spark plugs. New points and condenser and strong spark, and it pops right off when starting.
What are we overlooking?
Thanks!
When running the engine will surge, and cannot be controlled manually with the governor lever or when disconnected from the gov. From idle to WOT it more or less does what it wants. We can impact the air fuel mixture enough to make it lean backfire. He says the intake manifold is new. We verified good compression (118-122) on all cylinders. Also to note is raw gas will actually leak from the spark plugs. New points and condenser and strong spark, and it pops right off when starting.
What are we overlooking?
Thanks!