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2001 Sugar Sand Mirage with Sport Jet 175 loses power at full throttle

db199

Jet Boat Lover
Messages
21
Reaction score
1
Points
65
Location
GA
Boat Make
Sugar Sand
Year
2001
Boat Model
Mirage
Boat Length
16
Hey all. I had a rebuilt sport jet 175 installed in my boat a few years ago. It has been running fine but I encountered a problem that started recently. When I go full throttle, it runs fine or about 6-8 seconds, then loses about 80% of its power. I'm too nervous to continue pushing the throttle to see what would happen so I back off. Then it runs fine at all other engine/throttle speeds. Until I push it to full throttle again and it again loses power after a short time. Seems weird to me but I thought maybe one of you might have an idea of what may be happening. I've been planning on rebuilding my carbs with upgraded reeds but I have not done so yet. Perhaps it's a carb issue? Thanks for your help.
 

Cobra Jet Steering LLC

Jetboaters Admiral
Vendor
Messages
5,876
Reaction score
5,354
Points
452
Location
Florida
Boat Make
Yamaha
Year
2021
Boat Model
Other
Boat Length
Other
Fuel starvation, or water in the fuel, or could be a bad fuel pump, or air starvation from a dirty air filter.
 
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