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Yam F350 - Suz DF350: 2nd direct comparison

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Yam F350 - Suz DF350: 2nd direct comparison

Old 05-22-2019, 10:41 AM
  #41  
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Originally Posted by MakoMyDay View Post
In your sig pic it looks like the Yamaha was low as shit!
...yeah it came mounted pretty low - I had them raise it one notch though, making the ventilation plate perfectly level with the keel, and it basically beat all the test data after that, both top speed and fuel economy.
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Old 05-22-2019, 10:44 AM
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Originally Posted by MakoMyDay View Post
I just remembered one important thing--from the factory the Suzuki doesn't trim lower than level. There is a way to make it trim down another 5 degrees or so and it makes a huge difference. Do a search on here, but there's some sequence with advancing the throttle, pushing the start buttons and removing the kill switch that programs out the negative trim limit. It made a big difference on mine.
...but why would I need negative trim? Running the trim at minimum when planing basically presses the front into the water.
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Old 05-22-2019, 10:46 AM
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Originally Posted by amerelium View Post
...but why would I need negative trim? Running the trim at minimum when planing basically presses the front into the water.

Everybody needs negative trim sometimes. Planes faster, b ites better in turns, grips better in rough water, puts the bow down in rough water, decreases bow rise when planing, lowers planing speeds--just to name a few!
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Old 05-22-2019, 11:17 AM
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Originally Posted by MakoMyDay View Post
Everybody needs negative trim sometimes. Planes faster, b ites better in turns, grips better in rough water, puts the bow down in rough water, decreases bow rise when planing, lowers planing speeds--just to name a few!
Yeah - planes very fast as it is though, a few seconds, and already handles like a scooter with low trim. If I need to keep the bow very low in rough waters I can apply the trim flaps.

- I though u meant for like going fast
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Old 05-22-2019, 11:46 AM
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We run both engines on the Albury Brothers 33. The Suzuki runs 2 holes HIGHER than the Yamaha. We tried every configuration and prop. 2 holes higher than the Yamaha is best all around including top speed.
We have over a dozen DF350's on the water and they have been flawless.
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Old 05-22-2019, 12:26 PM
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Originally Posted by jlichterman View Post
We run both engines on the Albury Brothers 33. The Suzuki runs 2 holes HIGHER than the Yamaha. We tried every configuration and prop. 2 holes higher than the Yamaha is best all around including top speed.
We have over a dozen DF350's on the water and they have been flawless.
Same experience with single engine setup?
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Old 05-23-2019, 11:36 AM
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Same experience on the single DF350 on our Albury Brothers 27. We tried 3 different set ups. 2 holes above normal (both Yamaha and Suzuki non-duo prop engines) is the best and only place to be. You will
gain speed and fuel efficiency once you lift that bad boy up and reduce drag. Keep going up until she cavitates/aerates.
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Old 05-23-2019, 01:26 PM
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Wouldn't surprise me if monohulls ack differently then cats on engine height.
Most cats seem to do just fine with the cavitation plate a good bit above the transom.
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Old 05-24-2019, 02:03 AM
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Finally got to check the height myself - and it is absolutely perfect... for a single prop engine. Identical as I had with the Yamaha.
I have ordered a 4 inch jackplate so I can mount it higher - as you can see the problem is the lower bolts - no more to go, even though there're two more for the upper ones.


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Old 05-24-2019, 03:05 AM
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Can't you just fill and re-drill the two lower bolts?
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Old 05-24-2019, 03:15 AM
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Originally Posted by Fivec's View Post
I love all the comments from people who don't have/never had duo props. No they are certainly not made for racing, they are good to 70+ max. They do not however, exhibit the negative performance that is being discussed in this thread. One headed to head comparison is a 32 Regulator, Zukes are faster by 3kts, hole shot much greater, more efficient by.2-.3mpg, weighs less an planes the boat several kts earlier. Different boats will have different results and I believe the setup on this particular boat is not quite dialed in. I also agree that the engine is a bit too high.
Another good example where the Suzuki is better as mentioned above is the 33 Albury Brothers...same results.
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Old 05-24-2019, 03:22 AM
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I lost 8mph on my top end when I switched from Yamaha 350's to Suzuki 350's on my 39 Contender. Economy was the same. Hole shot is a little slower than the yamaha's but not by much. I'm waiting to go Mercury now.
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Old 05-24-2019, 05:58 AM
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Originally Posted by flntv View Post
I lost 8mph on my top end when I switched from Yamaha 350's to Suzuki 350's on my 39 Contender. Economy was the same. Hole shot is a little slower than the yamaha's but not by much. I'm waiting to go Mercury now.
May want to start your own thread, as it sounds like your set up or something is not correct.
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Old 05-24-2019, 06:49 AM
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Originally Posted by Blazer7420 View Post
Can't you just fill and re-drill the two lower bolts?
...well, no access from the inside down there.
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Old 05-24-2019, 07:37 AM
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Originally Posted by amerelium View Post
Finally got to check the height myself - and it is absolutely.....
.....at a good starting point. Dialing in engine height is not a mechanical stick and measure proposition but a try it/move it/try it again deal. I say you are low
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Old 05-24-2019, 07:44 AM
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Originally Posted by amerelium View Post
...well, no access from the inside down there.
Then, how do you plan to;
A) Remove the motor?
B) Install the jack plate?

The obviously got there to install this motor.
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Old 05-24-2019, 07:54 AM
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Originally Posted by Blazer7420 View Post
Then, how do you plan to;
A) Remove the motor?
B) Install the jack plate?

The obviously got there to install this motor.
Jack plate goes into the original bolts in the hull, which where modeled on a Yamaha F350
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Old 05-24-2019, 05:33 PM
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Originally Posted by amerelium View Post
Finally got to check the height myself - and it is absolutely perfect... for a single prop engine. Identical as I had with the Yamaha.
I have ordered a 4 inch jackplate so I can mount it higher - as you can see the problem is the lower bolts - no more to go, even though there're two more for the upper ones.



I would say it is to low in these pictures.
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Old 05-24-2019, 07:14 PM
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Suzuki now makes a bracket with more holes for more mounting options, I am switching out mine because the engines need to go up and I am maxed out on the existing holes so we are going to try the new style mounting brackets. I know there are more holes on the upper portion 7 I believe but I’m not certain about the bottom holes.
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Old 05-26-2019, 09:10 AM
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Originally Posted by seadar View Post
Suzuki now makes a bracket with more holes for more mounting options, I am switching out mine because the engines need to go up and I am maxed out on the existing holes so we are going to try the new style mounting brackets. I know there are more holes on the upper portion 7 I believe but I’m not certain about the bottom holes.
Really? Any more info on that anywhere?
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