finally on the water!

[flkeysaqua]

No I mean head wind (helps push the bow up a little bit more) less boat in the water

...my boat runs 42 or 43 with a good head wind

You mean "tail wind"?

[MarshMarlowe196]

Interesting...  

Have you tried trimming the motor up?  :eye:

[flkeysaqua]

Yeah but at the highest setting (so the motor doesn't cavitate) it will only push the bow up so far. With calm conditions but a 6 to 8 knot wind I get one more mph going into the wind as apposed to going with the wind.  My assumption is air causes less drag than water so if the wind pushes more of the boat out of the water than that’s where I gain the mph?

  P.s. sorry for stealing your post for a second

[Aswaff400]

sorry for bringing up an older post but i got an update on my boat, seems like each time out over the past 2 or 3 weeks, the top speed has been slowly increasing.

1st run: 31 mph
3rd run: 35 mph
5th run: 37 mph
7th run(today) 42.8 mph!
(36 mph into 15 knt wind)

i raised the motor up 1 hole and cupped the prop. now at WOT it reaches 5800 rpm, and now it instantly gets up on plane... im thinking it was just slow because the carbs where gummed up and after a few tanks ran through it, its all cleaned out! the cupping helped a ton, it can handle way more trim without cavitating... im still itching for more power though  :twisted:

[MarshMarlowe196]

seems like each time out over the past 2 or 3 weeks, the top speed has been slowly increasing.

1st run: 31 mph
3rd run: 35 mph
5th run: 37 mph
7th run(today) 42.8 mph!
(36 mph into 15 knt wind)

i raised the motor up 1 hole and cupped the prop. now at WOT it reaches 5800 rpm, and now it instantly gets up on plane... im thinking it was just slow because the carbs where gummed up and after a few tanks ran through it, its all cleaned out! the cupping helped a ton, it can handle way more trim without cavitating... im still itching for more power though :twisted:

Yup, I knew you should have been getting more speed with that motor.  That's good news that it worked itself out without you having to throw a wrench under the cowl.  What pitch prop are you turning?

[Aswaff400]

17 stainless

[GoneFission]

Sound like carb gumming and/or cylinder port carbon build-up.  Either way, what you have discovered is a boat rule:

Boats like to be run - idle boats have problems.  

or:

Use it or lose it.

Either way, regular use of boats and the engines that power or support them (mains and generators) keeps things running well.  Neglect, whether by maintenance or use, will allow degradation.

[Aswaff400]

Sound like carb gumming and/or cylinder port carbon build-up.  Either way, what you have discovered is a boat rule:

Boats like to be run - idle boats have problems.  

or:

Use it or lose it.

Either way, regular use of boats and the engines that power or support them (mains and generators) keeps things running well.  Neglect, whether by maintenance or use, will allow degradation.

that goes with anything, i run my quad every week so whenever i have a race i wont have any problems with the carb getting clogged up. my friend who races the same quad as mine lets his sit in between races, and the last race we where supposed be in he couldnt keep his running.