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Please help to diagnose the engine problems with LS2000

Yamatuf

Jet Boat Addict
Messages
69
Reaction score
25
Points
122
Location
Ellicott City, MD 21104
Boat Make
Yamaha
Year
1999
Boat Model
LS
Boat Length
19

Rudylgarcia

Member
Messages
2
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Points
10
Boat Make
Yamaha
Year
1999
Boat Model
LS
Boat Length
20
@Rudylgarcia, have you compression tested the engines? Those two strokes need rebuilding every 400 hours or so. That rebuild likely is less expensive if you catch it early.
I have not done a compression test nor rebuild anything just got boat a year ago and didnt get to use it mch.
 

Bruce

Jetboaters Fleet Admiral 1*
Staff member
Administrator
Messages
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Location
Royal, AR
Boat Make
Yamaha
Year
2007
Boat Model
SX
Boat Length
23
I have not done a compression test nor rebuild anything just got boat a year ago and didnt get to use it mch.
Go to an auto perts store. They likely will loan you a compression tester. Typically they want a card to hold for it.
 

Malkel123

Active Member
Messages
9
Reaction score
1
Points
30
Boat Make
Sugar Sand
Year
2004
Boat Model
Tango
Boat Length
16
Hi, so so sorry for hik jack this post, but I'm new to the yamaha ls2000, and having an issue with it, almost the same the tachs would show 3k, but gps is 50mph, also after running at that speed for 2 minutes or so if you bring it down to idle , it looks like wants to shutdown, also the throttle levers won't remain on position is like they are missing at part or something...any help would be really appreciated....again sorry for hik jack.
 

Malkel123

Active Member
Messages
9
Reaction score
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Boat Make
Sugar Sand
Year
2004
Boat Model
Tango
Boat Length
16
To add....is a bit hard to start.
 

Bruce

Jetboaters Fleet Admiral 1*
Staff member
Administrator
Messages
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Location
Royal, AR
Boat Make
Yamaha
Year
2007
Boat Model
SX
Boat Length
23
Hi, so so sorry for hik jack this post, but I'm new to the yamaha ls2000, and having an issue with it, almost the same the tachs would show 3k, but gps is 50mph, also after running at that speed for 2 minutes or so if you bring it down to idle , it looks like wants to shutdown, also the throttle levers won't remain on position is like they are missing at part or something...any help would be really appreciated....again sorry for hik jack.
1. Tachs may be broken or may lack signal. Those tachs were known for cracked housings.

2. The carbs are likely to be dirty. Try adding a can of Seafoam to every tank.

3. Your throttles are different but have a look athttps://jetboaters.net/threads/throttle-slip.31905/
 

Malkel123

Active Member
Messages
9
Reaction score
1
Points
30
Boat Make
Sugar Sand
Year
2004
Boat Model
Tango
Boat Length
16
Hi Bruce, and thank you for the quick response, really appreciated, is pre mix, would sea foam hurt anything?...and thank you for the post on the throttles.
 
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