1990 40 hp tiller won't run full speed

D.Harvey

Cadet
Joined
Mar 31, 2021
Messages
7
changed power pack, coil, trigger coil cleaned carbs still no full speed. ground brown wire to temp sensor and motor shuts off, disconnected brown wirw from power pack still no top speeed any ideas?
 

racerone

Supreme Mariner
Joined
Dec 28, 2013
Messages
38,681
Compression test is first thing to do before spending beer tokens on parts.----You may have a lot of good used parts now.
 

oldboat1

Fleet Admiral
Joined
Apr 3, 2002
Messages
9,612
"cleaned carbs" like "good spark" aren't too useful when problems indicate poss. ignition issues or carb issues. Start by posting model number to narrow things down. Then talk about methods for carb cleaning and spark testing (test of magneto output/strength).
 

Crosbyman

Vice Admiral
Joined
Nov 5, 2006
Messages
5,760
and... is this a new sudden problem or.... a slow progressive problem over time ? How is the boat underside ...crusted up or clean ?
Anything done to the engine before the problem started
Is this a sleeper you are just waking up for the new season ??
 
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