rpm at wot

t3699

Cadet
Joined
May 18, 2002
Messages
18
I am new to this and have just purchased 175 bass tracker with 9.9 merc took out sat and ran great but only hit 2700rpm does this sound right for 2 stroke will provide serial number shortly thanks
 

rickdb1boat

Supreme Mariner
Joined
Jan 23, 2002
Messages
11,195
Re: rpm at wot

No. You should be turning at least 5000 RPM's with that motor. Check for spark on cylinders. Souns like one is not firing. Also, if spark is good, replace plugs and see what happens. Run a compression test, too.
 

chippy

Seaman Apprentice
Joined
Mar 21, 2004
Messages
35
Re: rpm at wot

try a set of ngk spark plugs. They work very well with 2 stroke motors.
 

roscoe

Supreme Mariner
Joined
Oct 30, 2002
Messages
21,657
Re: rpm at wot

How much horsepower is this boat rated for?
 

t3699

Cadet
Joined
May 18, 2002
Messages
18
Re: rpm at wot

I will check plugs tommorrow I have manual coming<br />the moter is 1998 tracker merc serial number OT646001 9.9 thanks for info<br /><br />roscoe boat rated for up to 75hp<br /><br />checked plugs and compression plugs were just put in and compression ok I talked to the dealer where I bought boat he said problem sounds like charging coil he is going to look at boat this weekend and fix for free I think I found a good dealer boat was bought as is but he will repair anyway will update with what he finds
 

Mettaree

Petty Officer 1st Class
Joined
May 17, 2003
Messages
292
Re: rpm at wot

9.9hp on a boat rated max at 75hp seems to be a little underpowered. Probly be a little hard to get on plane. Check prop for pitch maybe too much. Very small motor for boat esp. with any sort of load.<br /><br /> :)
 

BassMan31

Seaman Apprentice
Joined
Jan 14, 2004
Messages
43
Re: rpm at wot

I have a 99 165 BassTracker with a 9.9 merc and I can hit around 6000 rpm I have a 9 pitch prop and I dont even get close to getting on plane
 

BubbaBaxter

Cadet
Joined
Mar 22, 2004
Messages
15
Re: rpm at wot

Sounds like your high speed charge coil is faulty. If you have access to a service manual, it should give you Ohm & Voltage specs. Good luck.
 

t3699

Cadet
Joined
May 18, 2002
Messages
18
Re: rpm at wot

got boat back was loose wiring in motor took out and runs great thanks for all the help
 
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