Normal operation of outboard at full throttle?

[sb1805]

We have a new 60hp Evinrude on a Zodiac Futura Mk3, and I had a question about full throttle operation. When I 'gun it' while I'm stopped, the rpms get stuck around 3000 until I get onto plane (which can be up to 20 seconds depending on how many people are on board) at which point they start rising towards 5500 as the boat picks up speed. Is this normal? Or should the rpms be able to shoot up to 5500 quickly, regardless of whether or not the boat is at it's top speed or not. Thanks for the input.

 

[Chris1956]

Re: Normal operation of outboard at full throttle?

Once a boat gets on plane, the RPMs should rise, proportionally with the rise in speed.

 

[ezeke]

Re: Normal operation of outboard at full throttle?

If you want to get out of the hole faster, drop the pitch of the propeller. You may loose a little top end at 5500, but your engine should be propped to reach closer to 6,000 RPM at WOT with your average load. The full throttle range of your engine is 5,000 to 6,000 RPM.

 

[Tig]

Re: Normal operation of outboard at full throttle?

Your RPMs indicate normal operation as you accelerate. Getting up on plane is like a car going up a hill, except you can't drop to a lower gear. If your load is heavy your engine will be slow to pick up revs until you do get up on plane.
"Vented" props may rev higher sooner, but some people do not like the low power/speed characteristics.
ezeke's advice is good if you want to make adjustments