What Size Engine

[zapad]

I have a 20 foot sun tracker bass buggy it has a 45 horse power mercury outboard . With a full load it hardly moves . What size engine could I upgrade to. The tag on the boat says 60 hp max. can I go bigger? Thanks

 

[Russell48]

Re: What Size Engine

It make a lot of diff when ya put the right prop on the motor, A 45 to 50hp motor is really plenty or power for a toon, I had a 24ft toon with a 80hp an a 19 pitch prop on it an it done a wonderfull job pushing the toon on the lake,,

 

[rickdb1boat]

Re: What Size Engine

If the tag says 60, then that's that maximum amout you can go without causing other issues. (Insurance, stress on the transom, Etc.)

 

[Russell48]

Re: What Size Engine

Yes that is true, An I have no idea how to jump that, But with a 22ft an a 50 or 60hp motor an the right pitch prop will make a big diff, Do ya know what size prop is on ya 45hp

 

[zapad]

Re: What Size Engine

I might have the wrong size prop I will check that out thanks

 

[Russell48]

Re: What Size Engine

Yeap,, Hope I help ya out there, An alot of guys puts to big of motor's on toons an they bust out the transom on them,

 

[zapad]

Re: What Size Engine

I don't want that to happen thanks again

 

[Jeep Man]

Re: What Size Engine

What year is your boat? I have a newer 20' Sun Tracker and it's rated for 115. I have a 60 on it and it runs about 20 mph at WOT. I'm running a 14x11 prop. Also, your motor needs to be a long shaft.

 

[zapad]

Re: What Size Engine

The year of the toon is 1986 the engine is a mecury classic 50 (45 hp) long shaft. Same year, I bought boat with the prop thats on it . What size prop do you recomend? Thanks

 

[Russell48]

Re: What Size Engine

I was talking to a friend of mine an he was saying about a 12 1/4 X 9 pitch should do

 

[zapad]

Re: What Size Engine

Thanks I wiil give that a try. Hope it helps

 

[mike243]

Re: What Size Engine

better see what your your wot rpms are,it will do no good to over prop or pitch it,$ is hard enuf to come by without having to eat the wrong prop.call bass pro & ask what is the correct for your toon,they can look it up with no problem

 

[Mr Crabbs]

Re: What Size Engine

With a full load it hardly moves .

What do you consider a full load?

I have a 2010 Party Barge 20 with the 90HP Merc. My boat is rated for 10 people, but with 7 adult sized people, gear, a full cooler and tank of gas it's not really peppy. It moves ok loaded, but certainly not like when it's just the three of us.

 

[steelespike]

Re: What Size Engine

What is the diameter of the logs?You should check your prop size before doing anything,usually under the prop nut.What is the present rpm with a light load?
The 60 won't change top speed much but will be just cruising when the 45 would be busting a gut.A 4 blade prop may improve speed slightly and will improve handling.

 

[5150abf]

Re: What Size Engine

you prop an outboard to an rpm not a situation, there is a max rpm your engine is suppose to run, you need to know what it is doing now to know where to go next.

If you just throw a prop on it and it is way under you could blow the engine by over revving it and if you put one on that is too big you will lug the engine to death.

What rpm is the engine turning now a wide open throttle?

Is the engine running as it should, if it isn't running properly no prop in the world is going to help you.

Lastly define "full load" are you staying within the load limit of the boat, if it is rated for 1400lbs and you are putting 1800lbs of people and gear on it that will slow you down too.

It is a pontoon, they aren't fast boats, even with the engine running perfectly and propped right it still isn't going to be fast especially loaded down with 6-8 people, it is just how they are.


I think loaded up 10-15 mph is all she even running perfectly.