Originally Posted by Sharkbyte
Afraid we don't venture anywhere near to Southend with our boat, James.
We tend to launch from the Harwich area.
The 30hp is plenty for what we do (28 knots). To be honest, the boat is just a vehicle for getting out to fishing marks. In all the years we've had our own boats not once have we ever gone out on a mess about / cruise.
60hp would probably spoil the boat for what we do. More fuel, more weight, unnecessary power.
That said, I've got a mint Yamaha 70hp with trim tilt that and a stainless 24p prop that I've often wondered about fitting for a laugh. Christ knows how that would go!!!
Oh that's a shame, nearest I have been is Mersey! lol
28 knots is good, that's 32mph! I take it you got that speed from your GPS fish finder gadget? According to Zodiac your boat (mark3 HD) does 60 Km/h (37mph) with one passenger, BUT
it does not say with what size engine! I assume it is with the "max allowed
" engine of 60 HP as opposed to the "min reccomended" 40 HP or the "max reccommended" 50 HP engine?! Maybe the 37mph speed they quote is with a 40 HP engine if your seeing a true
32mph from a 30 HP engine?!
I would say whack your 70 HP engine on just for "experimental purposes" to see what she can do!
lol. If it weighs less than 120kg then your laughing!
but then again its a lot of hassle if you purely use your boat for fishing only. Maybe your 30 HP engine will need a service soon, and whilst its off it could be a lovely hot weekend with calm flat seas, it would be rude not to try this experiment out!
Originally Posted by captnjack
It doesn't work that way. Load actually has nothing to do with tube pressure.
Regardless of the temperature the boat needs to be at the proper pressure to work right. Especially a SIB like the futura. As the day warms up you might need to vent air from the tubes. (I don't around here but our water is cold and it rarely gets that hot). When you pull it out of the water you will most definitely need to vent the tubes ASAP or the sun will heat them up and they will burst. The next day or week when you put it back in the water, everything will cool down and they will need to be topped up.
I use a scuba tank to fill my tubes. There are various electric pumps which have pressure cut-off points in them which also work well.
Ok mate thanks, will bear this in mind! Shame you said there isn't any self venting valves available for the futura!