McGrew 461 #1 Posted October 27, 2019 Hi folks, Since I have the throttle linkage working correctly now on my Raider 10, it no longer takes two men and a small boy to change the engine speed. The cable was so hard to pull, I just left it set at around 2500 rpm, and rarely changed it... Now that all is working correctly, i want to set the idle rpm, but cannot find a spec. Can someone tell me what it should be? The engine is a Tecumseh HH40. Thanks! Danny Share this post Link to post Share on other sites
WHX?? 51,784 #2 Posted October 27, 2019 Most small engines that are splash lubricated should be set to 800-1000 RPM. Anything less the engine might not get proper lubrication. Any thing more just more wear and tear. Pressure fed motors I have no idea ... perhaps a little lower.??? Share this post Link to post Share on other sites
pfrederi 18,690 #3 Posted October 27, 2019 Kohler specs 1250 for K series Haven't sen anything for Techies Share this post Link to post Share on other sites
McGrew 461 #4 Posted October 27, 2019 Thanks guys! I have a pretty comprehensive manual for this engine, but could not find a spec for the idle RPM... I swear it has every other thing you could ever want to know about the Tecumseh 8-18 horse engines... I agree about not setting it so low the splash lubrication is not adequate. I will set it at a minimum of 1000 and go from there depending on how well it idles at that speed. Thanks again! Danny Share this post Link to post Share on other sites
gwest_ca-(File Mod) 11,492 #5 Posted October 27, 2019 HH40? 1800 rpm idle speed in this manual Garry Share this post Link to post Share on other sites
McGrew 461 #6 Posted October 28, 2019 Garry, Thank you! Yes it is an HH140. I think you may have attached the wrong manual, as the HH140 is larger than anything I see in the attachment. FWIW, I tried setting the idle to 1000 RPM, and the engine was not happy. I bumped the idle to 1250, and it liked it better, but it has a hesitation when accelerating from idle. If 1800 is the spec, that may explain the hesitation off idle. Thanks again! Danny Share this post Link to post Share on other sites
gwest_ca-(File Mod) 11,492 #7 Posted October 28, 2019 I wondered if the HH40 was a typo but when I looked for the HH140 I could not find one. Found one for the HH120 plus others and they still show 1800 rpm. These pages came from an old manual I have so maybe they did not have a HH140 at the time. Garry Share this post Link to post Share on other sites
McGrew 461 #8 Posted October 28, 2019 Garry, The HH140 appears to be a bit of an oddball, even for Tecumseh... The only place I found any information on it is in Bolens literature. I did find one Bolens site that says to set the idle for that engine at 1700. I will give it a try and see how it feels. Thanks again! Danny Share this post Link to post Share on other sites
McGrew 461 #9 Posted October 30, 2019 OK guys, I bumped the idle speed up to 1700, and the engine seems happy at that speed. Did not get a chance to test it other than no load, but the hesitation just off idle seems much better. Thanks for all the advice and info! Danny Share this post Link to post Share on other sites
