The Hull Truth - Boating and Fishing Forum

Go Back   >
Search


Reply
 
Thread Tools Search this Thread
Old 11-05-2016, 06:31 PM   #1
Junior Member
Thread Starter
 
Join Date: Oct 2016
Posts: 23
Default Bouncing boat

Hello
I have a 1990 proline 20 center console that I repowered with a new 2016 evinrude 135 two stroke. It has a motor bracket that the engine is mounted on. The front sits up further than I have seen but spoke with proline about weight and power and I am within specs. The boat doesn't handle the waves very well. It seems to ride on top instead of running through them, if that makes sense. It smacks down when I come off the waves. I can't really handle any waves above 2 feet comfortably at all. The boat gets on plane. I was wondering if anyone else has had this trouble and ideas on a fix.
rodheld is offline   Reply With Quote
Old 11-05-2016, 06:46 PM   #2
Senior Member
 
Join Date: Dec 2010
Location: Satellite Beach, FL
Posts: 10,270
Default

Trim tabs?
Danny33486 is offline   Reply With Quote
Old 11-06-2016, 03:44 AM   #3
Admirals Club
 
Navatech's Avatar
 
Join Date: Apr 2013
Location: Miami Gardens FL
Posts: 5,689
Default

Engine trim?!...
Navatech is offline   Reply With Quote
Old 11-06-2016, 04:03 AM   #4
Admirals Club
 
Join Date: Apr 2015
Location: Boynton Beach, Fl
Posts: 175
Default

Back in the day, my buddy had a 1989 Proline 20. It had one of the old OMC Seadrive motors. No trim tabs. It was a very wet and pounding ride. Didn't stop us from fishing the crap out of it!
topflitegraphics is offline   Reply With Quote
Old 11-06-2016, 04:05 AM   #5
Senior Member
 
Join Date: Nov 2008
Location: Somewhere in the middle of Michigan
Posts: 9,932
Default

A few things to look at:
- How is weight distributed in the boat? Can you move some of that weight forward?
- The new outboard may be mounted too low. does the OB seem to throw excess water when you are running on-plane?
- Have you talked to a prop expert to find a prop that generates more lift at the stern?
yarcraft91 is offline   Reply With Quote
Old 11-06-2016, 05:35 AM   #6
Admirals Club
 
Join Date: Sep 2016
Location: The Best Coast, FL (Naturecoast)
Posts: 226
Default

Quote:
Originally Posted by Danny33486 View Post
Trim tabs?
^^^*Most important question to be answered first I would think. Then start looking at engine trim, engine mounting and weight distribution.
Hubboat is offline   Reply With Quote
Old 11-06-2016, 06:16 AM   #7
Junior Member
Thread Starter
 
Join Date: Oct 2016
Posts: 23
Default

No trim tabs
Weight is distributed very well
The prop gets to 5100 at max power. I know it's a little weak looking into anther prop

When I'm in going slow in a no wake my cowling is a little in the water.

No spray when on plane
rodheld is offline   Reply With Quote
Old 11-06-2016, 10:52 AM   #8
Senior Member
 
Join Date: Jun 2014
Location: skittleville fl
Posts: 6,535
Default

Isn't that a flat back style ? Post some pics of the engine and back of boat.
mitchell master is offline   Reply With Quote
Old 11-06-2016, 01:58 PM   #9
Senior Member
 
Join Date: Nov 2008
Location: Somewhere in the middle of Michigan
Posts: 9,932
Default

Quote:
Originally Posted by rodheld View Post
No trim tabs
Weight is distributed very well
The prop gets to 5100 at max power. I know it's a little weak looking into anther prop

When I'm in going slow in a no wake my cowling is a little in the water.

No spray when on plane
Interesting. I'm accustomed to seeing the bottom of the cowling between 15" and 18" above the water when my boats are running at no wake speed. If the outboard cowl was touching the water, water would be pouring over the transom. Sounds like your outboard sits much lower to the water, if we are talking about the same kind of cowling..

Photos would help, taken from the side showing the relative position of boat hull and outboard when trimmed to normal running position.
yarcraft91 is offline   Reply With Quote
Old 11-06-2016, 02:28 PM   #10
Junior Member
Thread Starter
 
Join Date: Oct 2016
Posts: 23
Default

Here's some pics. Sorry will get more if needed.

I have had a lot of boats but no salt water or center consoles boat so I don't have anything to compare.
rodheld is offline   Reply With Quote
Old 11-06-2016, 02:36 PM   #11
Junior Member
Thread Starter
 
Join Date: Oct 2016
Posts: 23
Default

Sorry here's the pics
Attached Images
     
rodheld is offline   Reply With Quote
Old 11-06-2016, 02:55 PM   #12
Senior MemberCaptains Club Member
 
Join Date: Aug 2005
Location: Cape Cod
Posts: 334
Default

Your boat is very stern heavy - you need to move a lot of weight forward.
caper is offline   Reply With Quote
Old 11-06-2016, 02:59 PM   #13
Senior Member
 
Join Date: Nov 2008
Location: Somewhere in the middle of Michigan
Posts: 9,932
Default

OK- we're talking about different cowlings.

That boat looks very heavy in the stern.
yarcraft91 is offline   Reply With Quote
Old 11-06-2016, 03:13 PM   #14
Junior Member
Thread Starter
 
Join Date: Oct 2016
Posts: 23
Default

There is nothing to move to the front. I don't carry a lot on the boat because of size. The back is filled with tackle box and rods. The front has cooler and mushroom anchor and fluke anchor.
rodheld is offline   Reply With Quote
Old 11-06-2016, 03:18 PM   #15
Admirals Club
 
Dead Horse's Avatar
 
Join Date: Jun 2010
Location: OIB
Posts: 4,532
Default

is that boat waterlogged???
Dead Horse is offline   Reply With Quote
Old 11-06-2016, 03:21 PM   #16
Admirals Club
 
Join Date: Jun 2015
Posts: 1,333
Default

The pounding from waves just might be how the hull rides. If the boat has a flat bottom and not much of a V ruff water is normally not your friend.
The boat being light in the nose might because of to much wait in the stern. Is the Brakket new or has it always been on the hull. When a motor is on a Brakket it changes a boat's center of gravity. If the center of gravity is changed to much one can experience a boat that is unbalanced from forward to aft. If the Brakket is not helping the boat you could maybe look at adding some floatation to it.
One simple fix might be a 4 blade prop. It will give you mor lift and bring the bow down. Also tabs might be your friend. The electric ones are what a prefer.

Quote:
Originally Posted by rodheld View Post
Hello
I have a 1990 proline 20 center console that I repowered with a new 2016 evinrude 135 two stroke. It has a motor bracket that the engine is mounted on. The front sits up further than I have seen but spoke with proline about weight and power and I am within specs. The boat doesn't handle the waves very well. It seems to ride on top instead of running through them, if that makes sense. It smacks down when I come off the waves. I can't really handle any waves above 2 feet comfortably at all. The boat gets on plane. I was wondering if anyone else has had this trouble and ideas on a fix.
boating blind is offline   Reply With Quote
Old 11-06-2016, 03:23 PM   #17
Senior Member
 
Join Date: Nov 2008
Location: Seacoast NH
Posts: 5,176
Default

You might consider looking at brackets with more floatation.
Boat Hound is offline   Reply With Quote
Old 11-06-2016, 03:29 PM   #18
Junior Member
Thread Starter
 
Join Date: Oct 2016
Posts: 23
Default

I think I need someone to come out and look at it but don't know who to contact. Any ideas/suggestions?
rodheld is offline   Reply With Quote
Old 11-06-2016, 03:32 PM   #19
Admirals Club
 
Join Date: Dec 2003
Location: Westbrook, CT USA
Posts: 741
Default

Cut stern weight and add a flotation bracket.

That boat will never run right like that.
Bryan A. is online now   Reply With Quote
Old 11-06-2016, 03:33 PM   #20
Junior Member
Thread Starter
 
Join Date: Oct 2016
Posts: 23
Default

The bracket came with boat. Called proline and gave them serial to verify. I am use to merc that would give me perfect prop specs for boat and motor, evenrude doesn't have that info. Any websites that might have those specs?
rodheld is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are Off

Forum Jump


All times are GMT -7. The time now is 05:54 AM.


©2009 TheHullTruth.com

Powered by vBulletin® Version 3.9.3.0
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.