Hull has to be cleaned?

[ragbar]

Hello everybody,
I just read that somebody recommends a nearly polished hull for best top speed results.

My hull has some Gelcoat stripes to repair scratches from the formaly owner.

I never took care of that, but was wondering why some 4.8 RC (with the same load)equipped with Yam 60 hp 4 Stroke are going 2-4 kn faster than mine with 65 hp 2 Stroke ( Suz Dt55 with 65 carbs on). Top Speed is 28kn with 65 l Petrol and full fishing Equipment.

What do you guys think, does it make sense making a full new hull cleaning to increase top Speed ? Is it worth the work?

Thanks

Eric

[matt h]

Alot of work for maybe a knot... Also you cannot compare an old DT55 with a Yam 60 four stroke.
As an example of another type of four stroke...I got 35 knots out of my RC 4.8 40 litres fuel.. merc 60 EFI 4 blade spitfire prop 11x17 pitch
Almost empty 37 knots.
Look at your RPM and prop/engine height/Balance hull etc