Sea rider 4m speed confusion?

[tom russell]

Just looking for a bit of help on speed issues and fuel efficiency.
I've recently bought a 50 yam 2 stroke on the back of my 4m sea rider it is very fast, I don't have a working GPS or speedo so would anyone be able to tell me how fast they recon it would go?
Also say I burnt 12.5 litres of fuel up in 2 hours of water sports yesterday, roughly would anyone be able to tell me how much a Honda 50hp four stroke would of burnt on the same day of watersports?
And how fast would a 50honda four stroke go on a sr4?

Cheers guys Tom

[Nos4r2]

Keep what you've got if it's got power trim,it's pretty much the optimum setup for loony tune fun in an SR4.
It's going to cost you far more than you'll save in fuel to change the motor and it'll be stern heavy.

[Mollers]

Depends how hard you hit the loud switch, but yeah, a BF50 could burn 12.5Ltrs during a day out. Easily in my Lad's hands.

[Nick Hearne]

I would say if you spent 2 hours playing around then sound right to me, I have the same set up!
Great combo. love the noise of the Yam

[Searider]

Mr SR4 "Deluxe" made 37 knots, two up, with a Yam 50hp 2 stroke. Mine didn't have power trim and may have gone a little faster if it had been possible to trim up a bit.

[9D280]

12.5L in 2 hrs = 6.25 L/hr

I have 10 more gee gees & a metre extra of boat and burn in the region of 10-12 L/hr on a steady 20-23-ish knot cruise.

Phrasing it as 0.8l/mile sounds more palatable!

FWIW if you want better data, you can pick up older Garmin handhelds (Waterproof!) for £40-50 off ebay. You can get a pre WAAS model for £30odd - I reckon that if you need WAAS accuracy, you should be hanging over the bow prodding the bottom with an oar!

The waterproof ones are
Cheap - GPS 12 & it's variants / GPS I, II,& III / original Etrex (the one with no data connection)
Reasonable - GPS 72/76 & that series / GPS-V / Etrex (not the new ones!)
Then you're into "new" territory
Other makes & models also available!