Home › Forum › Ask A Member › 1963 EVINRUDE 40HP RETEST AND EVALUATION (PART 2) › Re: 1963 EVINRUDE 40HP RETEST AND EVALUATION (PART 2)
There is no need for two threads on this engine.
At this point I see that you did not remove either the high speed jet or the needle seat and you have a high speed surge….. So….all you basically have done is do a little cleaning in the carb and re-used all the old parts. Trying to clean without removing all the parts and not replace any old or worn parts will produce these results.
Do yourself a favor and buy an OEM kit. Completely disassemble the carburetor, clean all passages, install the new parts, replace all fuel lines and be done with it!!
You will probably find debris under the seat, a nozzle gasket that is too old to seal anymore, or varnish or debris around the high speed jet when you do. If the hs jet is difficult to remove use heat from a propane torch around the threaded area and it will come right out.