Have a Force 85 supposedly an '89 model according to the previous owner who has lost the title, but that's another story. <br /><br /> I recently ordered an impeller 18-3017 from an online store listing it as correct for year '89. the impeller is taller than what i removed from pump. Another site lists it as a pn: "3065" which i assume (hate to) to be sierra pn 18-3065. i would like to know before i order this time.<br /><br />model tag says<br /><br />model: 856x9b<br /><br />serial: 1447<br /><br />any help would be greatly appreciated