Jim Carroll 14 Report post Posted December 30, 2005 I want to switch the pump on my 18 horse Honda from the General t9281 to a Ts2021. I need to know if anyone knows if I need to change both pulleys are just one and what size it would be. The 9281 that is on it runs at 1750 rpms and the 2021 is 1450 rpm. If anyone could help I would appreciate it. I would also be willing to sell the 9281 if anyone is interested. Share this post Link to post Share on other sites
BigPete 14 Report post Posted December 30, 2005 to change pump speed, you will need to change pulleys - one or both Share this post Link to post Share on other sites
Jim Carroll 14 Report post Posted December 30, 2005 I did not see an exact on the 1450 do you think I would be better going over or under. Share this post Link to post Share on other sites
Russ Johnson 141 Report post Posted December 30, 2005 Tell me the diameter of the engine pulley and I'll tell you what size the pump pulley has to be. If you want to work it out yourself, here's the formula: (Engine pulley X engine RPM) / Pump RPM = Pump pulley There's a formula to figure out the new belt size, too. I'll have to look it up for you tomorrow. Share this post Link to post Share on other sites
BigPete 14 Report post Posted December 30, 2005 here's a link Share this post Link to post Share on other sites
StainlessDeal 16 Report post Posted December 30, 2005 Pete, you can find the widest range of oddities: From Gummo to belt metrics in one skull... You may well be unique.:) Share this post Link to post Share on other sites
Russ Johnson 141 Report post Posted December 30, 2005 That is a cool calculator. Helluva lot easier than algebra. Share this post Link to post Share on other sites
Jim Carroll 14 Report post Posted December 31, 2005 I will have to pull the cover off and measure them for you. Share this post Link to post Share on other sites
