Scrubcadet10 Moderator Staff member Sep 29, 2020 #2 Most likely the governor gear on the engine is out but first i would try adjusting the governor.
R Rivets Lawn Royalty Sep 29, 2020 #3 See this thread from forum review of tachometers. https://www.lawnmowerforum.com/thre...ependable-tachometer.58424/page-3#post-362572
See this thread from forum review of tachometers. https://www.lawnmowerforum.com/thre...ependable-tachometer.58424/page-3#post-362572