Boat feels bogged down before getting on plane

Hey guys as title suggests, my boat feels "bogged down" in the water from about the 4-8knot range while just cruising.

In this speed range the ass end drops and the nose picks up like it wants to take off on the plane, motor almost sounds like it's over revving for the speed the boat is actually going, and the wake coming off the back is considerably larger than all the other boats around me whilst traveling through the marina. Once on the plane everything seems sweet.

Boat is a 5.2m side console ali with a 115hp suzi on the back. The suzi is the max rated hp for this hull. I dont think forward ballast is the answer as it rides relatively flat once on the plane.

Could a hydrofoil, prop change, or trim tabs be the answer?

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Posts: 171

Date Joined: 28/05/15

 Sounds pretty normal, have

Thu, 2019-11-28 17:17

 Sounds pretty normal, have you tried trimming down a bit more, most boats ride ass heavy until up on the plane and any boat on the plane isn't doing less than 8 knots.

beau's picture

Posts: 4016

Date Joined: 24/01/10

I'm usually trimmed all the

Thu, 2019-11-28 17:23

I'm usually trimmed all the way down until on the plane

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Posts: 171

Date Joined: 28/05/15

 Lifting strakes generally

Thu, 2019-11-28 17:36

 Lifting strakes generally don't take effect until around 10 knots, pretty normal for your stern to bog down.

ROCKPOM's picture

Posts: 606

Date Joined: 23/04/07

 Check your prop bush Beau

Thu, 2019-11-28 17:18

 Check your prop bush Beau

Brock O's picture

Posts: 2324

Date Joined: 11/01/08

Not full of water under

Thu, 2019-11-28 17:30

Not full of water under floor..

still trying's picture

Posts: 468

Date Joined: 27/06/17

 I have similar problems with

Thu, 2019-11-28 17:43

 I have similar problems with my 4.2 but have held off on doing anything because it goes so much better when out of the marina. Handles great with no worries about speed. 

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 rather be fishing

beau's picture

Posts: 4016

Date Joined: 24/01/10

Likewise but this time of

Thu, 2019-11-28 18:17

Likewise but this time of year i don't mind throwing the lures out the back for a few hours and notice it more than the rest of the year

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still trying's picture

Posts: 468

Date Joined: 27/06/17

 That makes alot of

Thu, 2019-11-28 18:44

 That makes alot of difference if I hit a it of swell going slow it just makes the situation alot worse and you have to gun it abut just to get the nose back down. Sometimes you wonder how am I so ass heavy all of a sudden. 

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 rather be fishing

beau's picture

Posts: 4016

Date Joined: 24/01/10

I asked the same question on

Thu, 2019-11-28 19:49

I asked the same question on a Facebook page of a community of boat owners who own similar styles of side and centre consoles, it's a 100% recommendation of a hydrofoil

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Scotte's picture

Posts: 1084

Date Joined: 07/12/06

The hydrofoil will lift the

Thu, 2019-11-28 19:59

The hydrofoil will lift the transom  so as long as you can run more nose up trim in a following sea without venting the prop you should be alright because you will need a bit more nose up trim with the hydrofoil than you need without it.

 

Posts: 4148

Date Joined: 01/02/10

 8 knots is always a fairly

Thu, 2019-11-28 20:13

 8 knots is always a fairly awkward speed. Your hull is transitioning from displacement to planing and isn't comfortable in the middle. 

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Does anyone know where the love of god goes, when the waves turn the minutes to hours?

beau's picture

Posts: 4016

Date Joined: 24/01/10

Yeah but even 4-8knots I have

Thu, 2019-11-28 20:21

Yeah but even 4-8knots I have the same problem as at 8knots. So even trolling i start worrying about the strain the motor sounds like it is under

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Posts: 548

Date Joined: 19/06/14

Hydrofoil

Thu, 2019-11-28 20:57

Will fix your blues Beau . Added one to my centre console and it made a world of difference!  . You won't be dissatisfied.

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 My wife understands why I clean my rods n reels in the shower....

 

little johnny's picture

Posts: 4074

Date Joined: 04/12/11

Sports 3000

Thu, 2019-11-28 21:31

Or prop change . I use 2 different props. 1 for deep . ( lower revs slow out of hole) 1 for close .quick out of hole less top end

scotto's picture

Posts: 2293

Date Joined: 21/04/08

Not good

Fri, 2019-11-29 05:34

Sounds like your boat and motor are rooted Bobo.

Your best bet is to buy a bigger boat

beau's picture

Posts: 4016

Date Joined: 24/01/10

So that's how you keep

Fri, 2019-11-29 08:13

So that's how you keep getting away with these upgrades eh!

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Posts: 5

Date Joined: 19/01/18

 maybe try an outboard wedge

Fri, 2019-11-29 19:37

 maybe try an outboard wedge to allow the motor more trim in.

i did that and foils on my old centre console.