Ropeless surfing, gonna install fuel tank vent higher next year

[dan144k]

After 6 years we finally got the boat set for ropeless surfing, guessing a 6' pocket, 3 days in a row.
3 guys 250 to 350lb range.
On inland surfer red rocket using:
Wake wedge
Perfect pass 10.0 mph
800 in ski locker
800 under port seat
Zero lbs in starboard locker
350+500 on swim deck
Stock impeller with lucky cones and 1 thin washer (solved the cavitation with weight problem)
( fuel cap under water on port side of boat, lol)

Thinking I should raise the fuel vent for next year above the new surf water line. I think it has a check valve, but better safe than sorry.

 

[swatski]

After 6 years we finally got the boat set for ropeless surfing, guessing a 6' pocket, 3 days in a row.
3 guys 250 to 350lb range.
On inland surfer red rocket using:
Wake wedge
Perfect pass 10.0 mph
800 in ski locker
800 under port seat
Zero lbs in starboard locker
350+500 on swim deck
Stock impeller with lucky cones and 1 thin washer (solved the cavitation with weight problem)
( fuel cap under water on port side of boat, lol)

Thinking I should raise the fuel vent for next year above the new surf water line. I think it has a check valve, but better safe than sorry.

This is great! And very encouraging. I have not played with the spacers in my L13 in the 240, just slapped all three on and left it alone. May need to explore now - given your results.

So, let me get this strait - you get better hole shot with 1 (golden?) spacer vs all 3, is that right? and this is with OEM venturi nozzle (regular 85mm? diameter - not bored out) and OEM impellers, correct?

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[dan144k]

@swatski
-skinny washer both sides
- stock impeller
- stock nozzle bore
- modified both nozzles angled down, welded and redrilled, guessing 5 degrees down.

With 3 washers we were getting cavation with more than 400 lbs on swim deck. Now with 1 skinny washer, surfed ropeless for 3 days with zero cavitation. Using a 2010 ar240

 

[swatski]

@swatski
-skinny washer both sides
- stock impeller
- stock nozzle bore
- modified both nozzles angled down, welded and redrilled, guessing 5 degrees down.

With 3 washers we were getting cavation with more than 400 lbs on swim deck. Now with 1 skinny washer, surfed ropeless for 3 days with zero cavitation. Using a 2010 ar240

I'm testing a reflash and have a program where I'm seeing hole shot cavitation. With no ballast - this is the first.
Gonna try removing some of the L13 spacers - see if that does the trick, like it did for you. Glad you posted this here, otherwise I would have started with boring the nozzles.

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[GTBRMC]

Impressive! Further proof that, when jetboaters put their sights on a target, they don't f**k around! Nice work.