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#573782 - 06/12/20 03:34 PM Tohatsu M40D2 3000 RPM Max  
Joined: Jun 2020
Posts: 1
BCassity Offline
Warrant Officer
BCassity  Offline
Warrant Officer

Joined: Jun 2020
Posts: 1
Austin
Hello, firstly this is my first post here and I am an aspiring boat mechanic so I don't know an awful lot so explaining more in depth would help me out a lot. I have a 1999 40HP M40D2 that would run great 2 months ago despite some starting issues. Since it had trouble starting I recently just had all the carburetors cleaned and rebuilt by a mechanic and had no problems. Fast forward a week and now the boat won't go above 3000 RPM when in gear, if I crank up the throttle it'll reach normal RPM. I changed the fuel line and all 3 spark plugs by myself and the boat still won't go max speed when in gear. Any help would be appreciated and explaining it a little more in depth for me would be awesome, thank y'all!

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#573784 - 06/12/20 05:45 PM Re: Tohatsu M40D2 3000 RPM Max [Re: BCassity]  
Joined: Oct 2003
Posts: 7,820
captkevin Offline
Admiral
captkevin  Offline
Admiral

Joined: Oct 2003
Posts: 7,820
Chicago, IL
Think i'd bring it back to the mechanic who rebuilt the carbs. Would guess that would be the issue.


2004 Rinker 232
2010 Dodge Ram Crew Cab Laramie 4x4
#573785 - 06/12/20 05:46 PM Re: Tohatsu M40D2 3000 RPM Max [Re: BCassity]  
Joined: Oct 2003
Posts: 7,820
captkevin Offline
Admiral
captkevin  Offline
Admiral

Joined: Oct 2003
Posts: 7,820
Chicago, IL
Also welcome aboard - lets us know how it works out


2004 Rinker 232
2010 Dodge Ram Crew Cab Laramie 4x4

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