Crusie speed for a 2003 21

[eyecatcher]

I have a 2003 210 i just wondering a ball park range for cruise to check for to see is i have water.

i have a 150 ox 66
ttop curtains

top end is around 35 at 5600
don't know what prop but have tried 2 though

mark

[k9reno]

when my 03 210 was new. I was able to hit 45 on a still day calm water 1/2 tank gas minimal equip and only me and neice. normal conditions 40 to 42.

Yamaha hpdi 150
14.25 18 pitch 4 blade stainless prop
best rpms 5250 wot. book recomends no more than 5500

best cruise is around 4500 or so rpm with about 33 mph

[Putershark]

That speed can vary greatly pending on prop pitch and type, boat load, trim, water conditions, etc, etc... Cruise speed though is not top end speed.

What most are looking to secure is the greatest range (even more important at $2.50 plus a gallon fuel) and most engines are designed to return such right at the 3000 to 4000 RPM mark. Any slower and you can loose MPG and much faster will greatly increase fuel burn (double or more GPH) for not a whole lot more speed.

WOT RPM measurements though are use to make sure that the engine is propped correct with that hull (here again that is not always constant) since the prop is also used as a way to govern / regulate the engine RPM.

This method of engine governing though is not as important today as in the past since most all modern 2 and 4 stroke engines are "limited" (over-speed protection) as to max permitted RPM's by the ECU. The ECU will start shutting down fuel to injectors if the engine starts to over-rev where as in the past, the prop (or the engine blowing up ) was the only real way to do such

Though having a boat propped to return the best top end speed is the goal of most, I look to also try and secure the best cruise speed when the engine is running right at 3000 RPM. Even if you loose a knot or 2 of flat out speed, you may be surprised as to how much faster it gets on a plane, has extended range and just how slow the engine can run and still keep the hull on a plane. Fuel flow gauges are excellent tools to find the "sweet spot" that your engine likes to run at that give you the greatest range, but if you don't such a tool... Best speed at 3000 RPM makes for a great starting point all things being equal.

[fl81turbozx]

We can get our '07 215 T-top F150 up to 55 in calm water

[Genelie]

My 02 210 with 115 hp on flat seas full tank and 2 people 39 max of course thtas with all the right conditions. cruising is about 24 knts.

[Tallmantwo]

I am guessing that someone is using their speedometer instead of a gps to get there top speed. Don't beleave there can be that much variation in speed with only a 10 horse difference. My speedoneter is 4-5 miles faster than what my GPS shows. Mel

[ksr5]

02 210 150 Yamaha 0x66 2 people 40 mph on gps. Putting Trim tabs on don't expect much difference wot with tabs but do expect to help in chop.

[Genelie]

Originally Posted by Tallmantwo

I am guessing that someone is using their speedometer instead of a gps to get there top speed. Don't beleave there can be that much variation in speed with only a 10 horse difference. My speedoneter is 4-5 miles faster than what my GPS shows. Mel

Yes you are right the various between my gps and speedo is about 2-3 diff

[walkerm]

42 mph on a 150 215-06.. Four blade 15 1/4 x 17 Solas.

[Gearyg]

39mph with a 115hp and a 210cc....please let me know your set up, I have the same equipment and by myself, max is 28mph. What am I doing wrong? Everyting sounds good, but no top end....any comments?