RPM Question

Shark

Active Member
Jun 16, 2020
200
Sayville, NY
Boat Info
2001 290 Sundancer
Engines
Twin 5.0L EFI w/Bravo II Drives
I have a 2001 290 Sundancer with twin 5.0L EFI with 395 hours. Both engines have been running great, since we got the bought in July. Today, took about twice as long to get up on plane, and the starboard engine was stuck at 3000 rpm at WOT (port was around 4500 and climbing). Once we finally planed off, the rpms got much closer (around 4000 & 3600). We usually cruise at around 3600 rpm on both engines, and they usually ramp up to speed together, with slight variations. The only difference I can think of is the amount of people/weight we had on board today. Probably about 500lbs more than usual. I can see that causing the slow planing, but the 3000 rpm with the throttle floored seems very strange. We’re going back out tomorrow, with our usual crew & weight, so I’ll see what happens. Do you guys have any suggestions or ideas? Thanks, Bob
 
See how it performs tomorrow with the usual crew and report back.

If it’s still sluggish, there are many possibilities.
From easier to more difficult, here are some possibilities:

Growth on the hull
Damaged prop
Rope or something caught in the prop
Fuel or ignition issues
Loss of Compression on one or more cylinders.
 
See how it performs tomorrow with the usual crew and report back.

If it’s still sluggish, there are many possibilities.
From easier to more difficult, here are some possibilities:

Growth on the hull
Damaged prop
Rope or something caught in the prop
Fuel or ignition issues
Loss of Compression on one or more cylinders.

Ok will do, thanks. My first thought was prop or something in the prop. I’ll see how it runs tomorrow.
 
See how it performs tomorrow with the usual crew and report back.

If it’s still sluggish, there are many possibilities.
From easier to more difficult, here are some possibilities:

Growth on the hull
Damaged prop
Rope or something caught in the prop
Fuel or ignition issues
Loss of Compression on one or more cylinders.
Went out today, with just my son, and we planed off normally, and both engines ran great. I guess the additional people and weight really threw off the starboard engine. Unless there was something else going on that somehow corrected itself. Either way, it was a huge relief!

I’ll keep an eye on it. Thanks for your suggestions Espos.
 
Went out today, with just my son, and we planed off normally, and both engines ran great. I guess the additional people and weight really threw off the starboard engine. Unless there was something else going on that somehow corrected itself. Either way, it was a huge relief!

I’ll keep an eye on it. Thanks for your suggestions Espos.
Sounds good. Nice day out today, we spent a few hours at Davis Park.
 

Forum statistics

Threads
112,948
Messages
1,422,804
Members
60,930
Latest member
Ebrown69
Back
Top