A BROOMHANDLE putter can help Dominique Boulet sweep bitter memories under the carpet in this week's $180,000 Hong Kong Professional Golfers' Association (HKPGA) Golden Harvest Invitational. In each of the past four years, 28-year-old Boulet has been pipped in the premier tournament on the domestic golfing calendar. But Boulet hopes a recent change to an extended broomhandle putter will provide the necessary upswing in fortune to finally see him to victory in the 72-hole event which tees-off over the Royal Hong Kong Golf Club's New Course this morning. ''I desperately want to win the tournament,'' said Boulet, beaten in a play-off in 1989, third in 1990 and runner-up in 1991 and 1992. In years gone by, putting has often proved to be Boulet's Achilles heel. Wielding his new putter to good effect, Boulet won two of the four 1993 Order of Merit tournaments and goes into the Golden Harvest on top of the overall standings. Boulet said: ''I've certainly holed more putts with the broomhandle than I was holing before . . . and I hope it will continue for another week.'' From Hong Kong, Boulet expects Richard Kan, Yau Sui-ming, Tang Man-kee, Derek Fung and Thomas Lloyd all to be in contention along with Singaporeans Bill Fung and Bill Fua and Myanmar's Kyi Hla Han. Kan, reigning Order of Merit champion, is the only man with a realistic chance of overhauling Boulet in this year's standings. To do so, though, he needs to win this week and hope Boulet finishes outside the top three. Yau, a seven-time winner of the tournament, has had a disappointing season and currently lies fourth in the merit table. However he sounded an ominous warning with a four-under-par 66 in Monday's Pro-Am. Meanwhile, Tang, the surprise winner last year, believes he is playing well enough to mount a serious defence of his title, while Fung and Lloyd, recently returned from America and Germany respectively, are also in good form. Singapore's Fung, a seasoned international representative, was runner-up in 1988 and 1990, while Han, who played on the Japanese PGA Tour in 1993, has the credentials to suggest he can become the first overseas winner since England's Carl Mason in 1987. One of the unique aspects of the tournament is that it is played over four different courses. Following today's opening round on the New Course at Fanling, the event moves to Discovery Bay tomorrow, Clearwater Bay on Friday and concludes on the Eden Course at Fanling on Saturday. Also taking part in the tournament will be many of the territory's leading amateur players who will be vying for points on their own Order of Merit. Among them are Tang Shu-wah, Jason Kwok, Michael Long and Lau Kwong-hon.