Evinrude E-NATION, for those dedicated to water, power, fishing and fun
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Mate
Posts: 3
Registered: ‎10-11-2019

300G2 - Donzi

Hi  Just ordered a new engine for a 2006 Donzi 26 ZF. Anyone have some thougts about the correct prop? 

 

Halfdan Alve 

Admiral
Posts: 8,391
Registered: ‎07-14-2011

Re: 300G2 - Donzi

 

 

What power did it have on it previously, how fast was it, and what prop was used?

 

 

 


"There is never just one thing wrong with a boat";
                    -- Travis McGee, main character in a book series by John D. McDonald 


 



***************

The factory recommends that a properly trained technician service your Johnson or Evinrude outboard motor. Should you elect to perform repairs yourself, use caution, common sense, and observe safety procedures in the vicinity of flammable liquids, around moving parts, near high-temperature components, and working with electrical or ignition systems.

The information offered here is only general in nature and should not be construed as complete factory approved procedures, techniques, or specifications. Always use the proper service manual for your motor, up-to-date service literature, the correct tools, and have an understanding of how to proceed with troubleshooting and repair methods. If you are unsure or uncomfortable with a procedure, a situation, or a technique, enlist the services of a factory trained technician.


Mate
Posts: 3
Registered: ‎10-11-2019

Re: 300G2 - Donzi

It was a 225 Merc EFI and I have no more info. (2nd hand boat) 

Admiral
Posts: 8,391
Registered: ‎07-14-2011

Re: 300G2 - Donzi

 

 

Are you looking for strictly top speed, and economical cruising speed, or just an all around prop for average boating usage?

 

Propping is trial and error, as is engine mounting height. The big block G2 , due to ists setback design and low water pickups on the gearcase, can normally be mounted higher on the transom than traditional motors as a starting point for testing.

 

 

 


"There is never just one thing wrong with a boat";
                    -- Travis McGee, main character in a book series by John D. McDonald 


 



***************

The factory recommends that a properly trained technician service your Johnson or Evinrude outboard motor. Should you elect to perform repairs yourself, use caution, common sense, and observe safety procedures in the vicinity of flammable liquids, around moving parts, near high-temperature components, and working with electrical or ignition systems.

The information offered here is only general in nature and should not be construed as complete factory approved procedures, techniques, or specifications. Always use the proper service manual for your motor, up-to-date service literature, the correct tools, and have an understanding of how to proceed with troubleshooting and repair methods. If you are unsure or uncomfortable with a procedure, a situation, or a technique, enlist the services of a factory trained technician.


Mate
Posts: 3
Registered: ‎10-11-2019

Re: 300G2 - Donzi

Thanks !  I will mount it as high as possible, and there is already a lot of setback on the boat. High speed is preferred.I will guess a raker, but 20" is maybe too much. It is a heavy boat (2 200kg) 

Highlighted
Admiral
Posts: 8,391
Registered: ‎07-14-2011

Re: 300G2 - Donzi

[ Edited ]

 

 

My guess would be close to yours for top speed priority, a 20" or 22" Raker depending on the speed of the boat and the engine rpm.  If you can get a prop that allows the motor to turn in the 5600-5800 rpm range, that would be ideal for best speed and fuel economy. Do not overlook an RX4 if you can try some, they are amazing on certain hulls.

If you do not have one installed, at least temporarily connect a mechanical water pressure gauge to the motor for the test runs to find the correct engine height.

 

 

 


"There is never just one thing wrong with a boat";
                    -- Travis McGee, main character in a book series by John D. McDonald 


 



***************

The factory recommends that a properly trained technician service your Johnson or Evinrude outboard motor. Should you elect to perform repairs yourself, use caution, common sense, and observe safety procedures in the vicinity of flammable liquids, around moving parts, near high-temperature components, and working with electrical or ignition systems.

The information offered here is only general in nature and should not be construed as complete factory approved procedures, techniques, or specifications. Always use the proper service manual for your motor, up-to-date service literature, the correct tools, and have an understanding of how to proceed with troubleshooting and repair methods. If you are unsure or uncomfortable with a procedure, a situation, or a technique, enlist the services of a factory trained technician.