Re: Stalling 1965 Merc 39 Home › Forum › Ask A Member › Stalling 1965 Merc 39 › Re: Stalling 1965 Merc 39 merk39Replies: 4Topics: 1 June 7, 2018 at 7:52 pm #77613 Yes it does start immediately, never tried not giving bulb one pump. Spark checker looks like a must have diagnostic tool and for only $4.99