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Honda 100hp on Extreme 545

Printed From: The Fishing Website
Category: General Forums
Forum Name: The Boat Shed
Forum Description: Discuss all things boating.
URL: https://www.fishing.net.nz/forum/forum_posts.asp?TID=138067
Printed Date: 22 Jun 2024 at 3:57pm


Topic: Honda 100hp on Extreme 545
Posted By: Fishing4T
Subject: Honda 100hp on Extreme 545
Date Posted: 10 Dec 2023 at 12:47pm
Does anyone out there have any experience with an Extreme 545 with a Honda 100hp outboard. Interested to hear performance reviews as I have a few concerns that our boat is not performing as it should in regards to motor needs to be trimmed fully down or it porpoises and max speed 50km/hr flat out
Hole shot take off is very slow and boggy . Cheers



Replies:
Posted By: Bounty Hunter
Date Posted: 10 Dec 2023 at 5:19pm
There have certainly been a few posts from owners of Extremes with similar behaviour re; the bouncy nose. 

It appears to be a common trait across a few of their boat models - you could even see it when watching the Big Angry Fish television program.

With regards to solving it - no personal experience, but I do recall one chap having success with installing a Permatrim - type attachment. 

A set of trim tabs, i expect, would also largely solve your trim problems.

Another approach - which should also help with the lack of 'get up and go' - would be to move to a 4 bladed S/S propeller. Broadly speaking these offer more efficiency - and 4 blades specifically, will have more blade area for initial push and typically more stern lift than your factory supplied propeller.


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No disintegrations!


Posted By: Kandrew
Date Posted: 10 Dec 2023 at 7:51pm
Originally posted by Bounty Hunter Bounty Hunter wrote:

There have certainly been a few posts from owners of Extremes with similar behaviour re; the bouncy nose. 

It appears to be a common trait across a few of their boat models - you could even see it when watching the Big Angry Fish television program.

With regards to solving it - no personal experience, but I do recall one chap having success with installing a Permatrim - type attachment. 

A set of trim tabs, i expect, would also largely solve your trim problems.

Another approach - which should also help with the lack of 'get up and go' - would be to move to a 4 bladed S/S propeller. Broadly speaking these offer more efficiency - and 4 blades specifically, will have more blade area for initial push and typically more stern lift than your factory supplied propeller.

Agree with the 4 blade well worth a try.


Posted By: GregS
Date Posted: 10 Dec 2023 at 8:09pm
Also agree with 4 blade, grips water better like having good tyres on the road. Better mid range rpm economy and less riding the throttle in choppy conditions.
Motor height is another big influence on boat performance, may help with porpoising.
I'm no expert and there is lots in it but if you do the research its well worthwhile.
I think rule of thumb is to drop an inch of pitch to go 4 blade


Posted By: Fishing4T
Date Posted: 10 Dec 2023 at 8:40pm
Thanks for the reply, the permatrim thought did cross my mind. The 4 bladed prop sounds like a great place to start investigating. Cheers


Posted By: Griff the dog.
Date Posted: 10 Jan 2024 at 7:02am
Another thing you could try is playing with the motor height .
I once had a McLay 6 fisherman.
While i was out of the country my brother took it to a shop to get it serviced. 
The mechanic  insisted the motor was mounted to high and dropped it down two holes 
Totally killed the handling The boat no longer responded to trim and lost about 20% in top end speed 
50 kmh sounds very low for the boat and power what is your prop and  max revs?  


Posted By: Snapper12
Date Posted: 05 Feb 2024 at 8:29am
You need 4 blade prop 15p
Have one if u keen.
02108256334



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