motor shaking at mid range

MickLovin

Master Chief Petty Officer
Joined
Feb 18, 2013
Messages
822
HI guys took my motor out again today with the 17" prop, could still only get the motor to 4500RPM with the tacho synced, also was only getting 38mph. I have a strange feeling it is a carbie problem.
 

MickLovin

Master Chief Petty Officer
Joined
Feb 18, 2013
Messages
822
Re: motor shaking at mid range

Ok I found the problem, the prop after tightening it and feeling like it was tight,, still had 5mm play, I have changed back to my 21", I wasn't happy with the 17" speed overall, It was like I had dropped 5mph or more. I was getting 36MPH at WOT, before I was getting 40+ at WOT, but at that time I was unsure about the Tacho, and after syncing it, it still doesn't seem right that I was only getting 4300 - 4500 RPM. The setting for the Tacho as a 6 pole seems to be closer than set as a 12 pole. at 5500rpm at a 12 pole you set it at 5.5 and as a 6 pole you set it at 3.7 - 3.8, when I syncd it last time and tried to set it at 3.8 it seemed like the RPM was to high compared to my handheld. As I say I have a original Chrysler tacho that works coming soon, so I will wait for that.
 
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