Notices

Suzuki DF350 vs DF300

Old 03-15-2019, 03:22 PM
  #1  
Admirals Club Admiral's Club Member
Thread Starter
 
Join Date: Jul 2012
Location: Orlando, FL
Posts: 1,798
Default Suzuki DF350 vs DF300

Now that the DF350 has been out a bit, any owners mind sharing reports? I'm debating the 300 vs 350 for my new boat.

Fuel economy seems a TINY bit better for the 300 on this hull, but enough variables in the test days (25 vs 50 gallons of gas, 5mph winds vs 20mph) that it might be null. I would be THRILLED if a 5-10% economy difference was dramatic enough to sway my buying decision, but ultimately I don't get off work enough to make a 5% fuel savings much of an issue LOL.

A review says the 350 gets better economy than the 300 around the 35-40 second mark

350
http://www.suzukimarine.com/~/media/...%20DF350A.ashx

300
http://www.seapromfg.com/uploads/5/6...suzuki-300.pdf


Suzuki 350 Pro's
- No buyers remorse for not going max hp
- Reports say the dual prop steers better
- Possible resale value
- Possibly less prop torque

Suzuki 300 Pro's
- Long history of reliability
- Possibly better fuel economy
- Cheaper

Coming from a DF200A, the 350 was a bit loud on the test drive. I have never driven a 300, so I have no comparison.
jj1987 is offline  
Old 03-15-2019, 03:25 PM
  #2  
Admirals Club Admiral's Club Member
 
Join Date: Aug 2014
Location: Coastal GA
Posts: 1,869
Default

The 350ís fuel economy benefits from a higher compression ratio.
Ric232 is offline  
Old 03-15-2019, 04:46 PM
  #3  
Senior Member
 
Join Date: Feb 2015
Location: Chesapeake, VA
Posts: 1,563
Default

I would go df350 to be honest if I bought a new boat capable of 350s I probably would buy df350s. I dont think I have seen a single report on this forum of problems with them. But I could be wrong.
Adam9066 is offline  
Old 03-15-2019, 04:50 PM
  #4  
Admirals Club Admiral's Club Member
 
Join Date: Sep 2010
Posts: 1,611
Default

I just bought a 2800 bluewave with a df350 and take delivery next week. Everything I read has been good for the most part on the 350. I canít wait to try it out.
cp5899 is offline  
Old 03-15-2019, 04:59 PM
  #5  
Senior MemberCaptains Club Member
 
Join Date: Mar 2003
Location: United States
Posts: 8,987
Default

The simplicity and durability of the 300hp is superior to the 350hp.

If you plan on running to the grave, I would want the 300hp. To keep and sell before warranty is over then take the 350hp.
captbone is offline  
Old 03-15-2019, 05:27 PM
  #6  
Admirals ClubCaptains Club Member Admiral's Club Member
 
Join Date: Dec 2003
Location: Elberta, AL
Posts: 1,724
Default

Pros:
I had a DF300 on my boat and put a DF350 on after 140 hours. The DF350 gets .1 to .2 MPG better thought the whole RPM range. It Is 2 to 4 MPH faster thought the whole RPM range. The extra power and the Duroprop is like have the boat in four wheel drive all the time. They do not slip, and with the DF300, I had to work the throttle in big seas. Not with the DF350, set it at a comfortable speed and set the auto pilot and let it work.
Now for the cons:
The DF350 is a little louder than the DF300 above 4500 RPM.
The duroprops do create torque steer. I had to put power assist steering on my boat to make it comfortable to drive again. But the duroprops get rid of the torque lean created by large single outboards. I had to run a lot of tab in one side to make the boat run level with the DF300. With the DF350 I use very little tab. If I do it is just to push the bow down in a head sea.

I would buy another DF350 no question. But the DF300 is a very good motor. And I would not have repowered, if I did not think my boat would have benefitted from the extra power, And it did.
cold beers is offline  
Old 03-15-2019, 07:55 PM
  #7  
Admirals Club Admiral's Club Member
Thread Starter
 
Join Date: Jul 2012
Location: Orlando, FL
Posts: 1,798
Default

Originally Posted by cold beers View Post
Pros:
I had a DF300 on my boat and put a DF350 on after 140 hours. The DF350 gets .1 to .2 MPG better thought the whole RPM range. It Is 2 to 4 MPH faster thought the whole RPM range. The extra power and the Duroprop is like have the boat in four wheel drive all the time. They do not slip, and with the DF300, I had to work the throttle in big seas. Not with the DF350, set it at a comfortable speed and set the auto pilot and let it work.
Now for the cons:
The DF350 is a little louder than the DF300 above 4500 RPM.
The duroprops do create torque steer. I had to put power assist steering on my boat to make it comfortable to drive again. But the duroprops get rid of the torque lean created by large single outboards. I had to run a lot of tab in one side to make the boat run level with the DF300. With the DF350 I use very little tab. If I do it is just to push the bow down in a head sea.

I would buy another DF350 no question. But the DF300 is a very good motor. And I would not have repowered, if I did not think my boat would have benefitted from the extra power, And it did.
Thanks, that was very helpful
jj1987 is offline  
Old 03-15-2019, 08:12 PM
  #8  
Senior MemberCaptains Club Member
 
Join Date: Oct 2002
Location: Burgess VA
Posts: 277
Default

Twin DF350's on a 36 Judge - 90 hours - love them!
commok is offline  
Old 03-15-2019, 08:51 PM
  #9  
Admirals Club Admiral's Club Member
 
Join Date: Dec 2015
Posts: 375
Default

Originally Posted by commok View Post
Twin DF350's on a 36 Judge - 90 hours - love them!
thinking of hanging a set on a 31 steiger heavy pilot house boat like yours how many gph do the burn at trolling speed 6-7kt
tt6099 is offline  
Old 03-16-2019, 10:22 AM
  #10  
Senior MemberCaptains Club Member
 
Join Date: Oct 2002
Location: Burgess VA
Posts: 277
Default


with both motors in gear, at idle, around .5gph each... here is the detail from Boating mags review of the Judge 36...
https://www.boatingmag.com/outboard-vs-inboard#page-13
Judge 36 Chesapeake With Suzuki DF350As
As press time approached, we got in a quick sea trial of the newest 36 Chesapeake, an open fishing version powered with Suzukiís revolutionary DF350A outboards and featuring the auto-trimming Zipwake system. Itís a rocket, touching 50 mph at wide-open throttle, but it cruises almost as efficiently as the boat with 300s at speeds more realistic for coastal conditions. The contra-rotating propellers lift the hull higher, increase acceleration, track precisely at all speeds, and offer better maneuverability.
commok is offline  
Old 04-29-2019, 03:57 PM
  #11  
Admirals Club Admiral's Club Member
 
Join Date: Apr 2018
Posts: 85
Default

80 hours on trip df350s on 430 intrepid. very happy with the ride, they do not slip at all. had df 300s on a 377 intrepid before and had some slip when taking a head sea.

as someone stated, above 4,500 rpms they are a lot louder than I would like them to be, thats the only negative thing I can say about them.

getting about .85mpg on a medium load which apparently is not bad for a heavy boat like mine.
LBM1 is offline  
Old 04-29-2019, 04:05 PM
  #12  
Admirals ClubCaptains Club Member Admiral's Club Member
 
Join Date: Mar 2005
Location: Jupiter, FL
Posts: 624
Default

Originally Posted by jj1987 View Post
Thanks, that was very helpful
and very accurate
jlichterman is offline  
Old 04-29-2019, 05:03 PM
  #13  
Admirals Club Admiral's Club Member
 
Join Date: Sep 2010
Posts: 1,611
Default

I took delivery of my 2800 bluewave with a df350 3-4 weeks ago and like others have mentioned the duoprop setup does not slip. I run a lot of twisting bayous heading to the gulf and it is nice to not lose speed in the turns like I have with many other boats. I am getting 3 mpg from 30-35 mph which I feel is good for a 28í boat. I will agree with the others that the motor is louder than I thought it would be above 4500 rpms. I had a verado before so that has me spoiled because they are whisper quite in my opinion.

In the last 3-4 weeks I have put 53 hours on the boat and have not had the first problem and I really like the motor. Dock handling with the duo props is absolutely awesome! I had concerns with a single engine 28í boat, but it is extremely easy to handle.

I would definitely buy the df350 again.
cp5899 is offline  
Old 04-29-2019, 07:35 PM
  #14  
Admirals Club Admiral's Club Member
 
Join Date: Oct 2009
Location: Hoboken, NJ
Posts: 867
Default

I have twin zuke 350s with 170hours. Not enough hours to find out issues yet. My problems have been minor 1) one latch broke for the engine cowling 2) both engines made significant oil till 30 hours ago. Seems wahoo trolling fixed it 3) c10 gauge broke

Reported significant issues on THT that I have seen are three failed lower units under 400 hours.

So for a gen 1 engine there doesn't appear to be many Gremlins.
Brocnizer1 is offline  

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


Thread Tools
Search this Thread