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M

motsis

Well-Known Member
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Boat Make
Sugar Sand
Year
1995
Boat Model
Other
Boat Length
17
hello all;

I'm new to this forum and the Sugar Sand boats. So I had a small barn find boat that I took a chance on. Long story short I cannot get it to start. Here is what I have:

  • Mercury sports jet 120 engine
  • Good Compression on all cylinders
  • New Spark plugs
  • New Starter
  • turn water on to begin flushing
  • engine cranks strong but does not fire
  • Does not take long, but eventually builds pressure to the point where starter cannot turn anymore.
  • after taking plugs out, i find a water fuel mix in the lower cylinder
I heard that you really do not want a lot of water running, while flushing, but have no clue what that means? Would I be better to leave the water off and as soon as she kicks, get water flowing?

I have read with these sports jet engines water getting in that lower cylinder is normal? totally goes against my knowledge of other engines.

Anything I am doing wrong in my above procedure? Any Suggestions? If I can get it to run, i'm a hero with my kids, if I cannot, i'm a big ZERO... :(
 
Marvin willis

Marvin willis

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No water should be in the cylinder. You shouldn’t turn on the water to flush until the motor is running. You might have a blown head gasket. If any of my engines don’t run I spray starting fluid into the intake. If it cranks then you might not be getting fuel to the cylinders
 
M

motsis

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Ok, cool! thanks for the fast reply! That is what I was thinking as well. Maybe tomorrow I'll first try not running the water until it fires. This little boat sat for 2 years from what I'm told so 1/2 of me is wondering what things are sticking internally etc...
 
Marvin willis

Marvin willis

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Check your oil. I’m guessing it’s gonna be milky from the water. Change ASAP
 
Port0222

Port0222

Jetboaters Lieutenant
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Year
2006
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Assuming the sugar sands also have a lanyard, similar to jet skis and Yamaha jet boats. Might be worth ensure that is not disconnected. In the FAQ section, I think there is a section about things to check if your boat won’t start. On Yamaha’s, you have to be in neutral.

Also, I know it was addressed above, but no need to run the water until the motor is running. Water in the cylinder is not good.
 
S

spatty99

Jetboaters Captain
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I had a Sugar Sand with 240 EFI a while ago, but I'm still pretty sure the protocol was water on, engine on, engine off, water off (opposite Yamaha). So I wouldn't think flushing water is a culprit, this isn't the same design as the Yamaha's that can back flow flushing water into the cylinders.
 
Marvin willis

Marvin willis

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If that’s true he won’t be going out on the boat anytime soon
 
B

Bill Eager

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1999
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Ok have owned sugar sand since new with 120 sport jet, with flushed unit installed to of head, water on engine off then start, if you have water cyl 4 , figure Head gasget is shot, do not use starter fluid, make a fuel oil mix in a spray bottle or just cup your hand over the carburetors to choke them till your hand gets wet only take a second
 
D

Derricknospark

Member
Messages
1
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Boat Make
Sugar Sand
Year
1995
Boat Model
SS
Boat Length
24
I’m knew on here,not sure I’m doing this properly or not but I have a 95 sugar sand super sport with 120 mercury engine .got cheap been sitting for bout 10 years was soppose to of been running great last time it was used,I know I will have to go through carbs ,I bypassed kill switch ,motor turns over fine but have no spark all fuses are good wondering where I should start checking next
 
Cobra Jet Steering LLC

Cobra Jet Steering LLC

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