Tohatsu 9.8 2017 4stroke making strange noise

Snibbe

Recruit
Thread starter
Joined
Jul 1, 2019
Messages
2
Hi, i have a problem with My tohatsu 9.8 making a strange sound at a specific rpm, took it to the the local tohatsu workshop but they didnt find anything,

YouTube Link https://youtu.be/RiNsPSBweU0
 

pvanv

Admiral
Joined
Apr 20, 2008
Messages
6,587
As was discussed ad nauseum 10 years ago, that sound happens on some MFS8/9.8 motors around 2200 RPM. It is a harmonic in the intake. It is not an indicator of anything wrong. Because the rest of the motor is so quiet... that is why the sound is heard.
 
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