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How's those Yamaha 425's working for you ?

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How's those Yamaha 425's working for you ?

Old 05-04-2020, 06:39 AM
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Default How's those Yamaha 425's working for you ?

Any words of encouragement on the Yamaha 425 xto's ? Any owners care to comment ? Good or bad ? Only verified dock rumors wanted (no "I heard it thru a friends sister's uncles next door neighbors brother in-law please). Comment here or PM me if you like.

Many thanks for your input
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Old 05-04-2020, 06:48 AM
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I haven’t seen one in the wild yet.. Where in SE PA are you?
Old 05-04-2020, 06:58 AM
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Originally Posted by ERG153 View Post
I haven’t seen one in the wild yet.. Where in SE PA are you?
Just north of Wilmington … And I fish just south of you in OC.
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Old 05-04-2020, 07:06 AM
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Fished on a 39’ Seahunter last summer w/ trips. Pushed the boat great. Gobs of power and torque. Quiet at idle like all 4 strokes but they do have that throatier v8 growl when they spool up. If you’ve got a big offshore boat that can handle the weight they’re a great option. They’re Yamahas.
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Old 05-04-2020, 09:05 AM
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I have not been on the boat yet but my neighbor across the canal has trips on his 39' Seavee. He says they have been great. I think he has had them for about a year now.
Old 05-04-2020, 10:25 AM
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My buddy seems to like them on his 34 Freeman...been solid so far...
Old 05-11-2020, 04:11 AM
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Originally Posted by brdawg2001 View Post
My buddy seems to like them on his 34 Freeman...been solid so far...

Got any performance numbers on that 34 Freeman? Wondering what kind of economy and top speed he's seeing.
Old 05-11-2020, 05:41 AM
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I wonder how the integrated power steering is working out ?
Old 05-11-2020, 05:56 AM
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Have two close friends, one has a single on a 25 the other has twins on a 31. I have been on boat boats and have nothing negative to say! Neither owner has 100 hours yet, but so far they have been reliable and performance is impressive.
Old 05-11-2020, 08:11 AM
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Originally Posted by fishcop View Post
Have two close friends, one has a single on a 25 the other has twins on a 31. I have been on boat boats and have nothing negative to say! Neither owner has 100 hours yet, but so far they have been reliable and performance is impressive.
Holy crap. 2,000 pounds of motors hanging off the transom of a 31.
Old 05-11-2020, 08:25 AM
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My buddy has a new 34' Intrepid with Twins.

He loves them so far.
Old 05-11-2020, 08:30 AM
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I have triples on a Grady 375 Freedom. Only 70 hours so far but I've been very happy. TONS of torque, low mid range is strong and noise level is acceptable. High RPM is loud as you would expect from 24 cylinders doing their thing. Set Point capabilities are impressive with both stern and bow hold options. Integrated steering works very well. All in all, I don't have any negative impressions so far. It's a 20000 lb boat and they can push it to almost 55.
Old 05-11-2020, 08:32 AM
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Works very well. And I like the clean look.
Old 05-11-2020, 08:33 AM
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Originally Posted by Bucktail67 View Post
I wonder how the integrated power steering is working out ?
Works very well and I really like the clean look.
Old 07-25-2020, 06:04 AM
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This response may be a little late for your purpose...

200 hours. Trip 425s on a 42 YF. Previously had trip mercury 400s.

performance:



Its nominally faster and more efficient than the 400s.

Pros:
- Great torque and electronic steering gives it a small boat type handling. Jumping up on plane is almost instantaneous with tabs down... not at all important to me on an offshore boat, but a lot of fun. We dive about half the time and performance not much different with 6 guys, 18 tanks (torque).
- Easily jumps on plane on two engines. 400 Mercs would get you up, but would have to dump ice and water and work it a bit.
- Doesn’t burn oil. The merc 400s we had to top off every two trips (~200miles).
- Cowlings are robust, no corroded cables (issue with merc 400s)... but a negative too.
- Easy to work on. In water gear lube replacement is great. We do the 100 hr services and plan on 300 at a dealer to replace water pumps. For us it takes less time to do it ourselves vs take it to be hauled and serviced. 100 hr service takes ~2-3 hours per engine.
- exhaust routing in reverse really does improve reverse thrust. Great for maneuvering. Definitely have the feeling I could swamp boat in reverse if I tried... have gotten too close for my comfort playing with it in calm water.

Cons:
- they are loud over 4300 rpm. I saw the affect of hearing loss with my father and brought a db meter on boat. They are loud enough you should be wearing ear plugs. 82db ~4500 rpm. 93db WOT.
- they are heavy. Absolutely affects trim on boat. Can manage it to extent you can move weight to forward storage... else you’ll need to run with some tabs.
- cowlings are robust, also a Pro... taking side cowlings off to do oil changes, spark plugs, medium pressure fuel filter takes some time. If just the top cowling to check oil, its a breeze.

If the noise wasn't an issue I would say a complete home run. I’m working on a cutting board that can swivel and incorporates some sound deadening / reflective material to reduce this issue. Tests knock down the DB ~5-10 and its like a richter scale where the scale is exponential... so could resolve that issue.

Time will tell, but my impression is they are going to be very durable.
Old 07-25-2020, 01:06 PM
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Originally Posted by thebentrudder View Post
This response may be a little late for your purpose...

200 hours. Trip 425s on a 42 YF. Previously had trip mercury 400s.

performance:



Its nominally faster and more efficient than the 400s.

Pros:
- Great torque and electronic steering gives it a small boat type handling. Jumping up on plane is almost instantaneous with tabs down... not at all important to me on an offshore boat, but a lot of fun. We dive about half the time and performance not much different with 6 guys, 18 tanks (torque).
- Easily jumps on plane on two engines. 400 Mercs would get you up, but would have to dump ice and water and work it a bit.
- Doesn’t burn oil. The merc 400s we had to top off every two trips (~200miles).
- Cowlings are robust, no corroded cables (issue with merc 400s)... but a negative too.
- Easy to work on. In water gear lube replacement is great. We do the 100 hr services and plan on 300 at a dealer to replace water pumps. For us it takes less time to do it ourselves vs take it to be hauled and serviced. 100 hr service takes ~2-3 hours per engine.
- exhaust routing in reverse really does improve reverse thrust. Great for maneuvering. Definitely have the feeling I could swamp boat in reverse if I tried... have gotten too close for my comfort playing with it in calm water.

Cons:
- they are loud over 4300 rpm. I saw the affect of hearing loss with my father and brought a db meter on boat. They are loud enough you should be wearing ear plugs. 82db ~4500 rpm. 93db WOT.
- they are heavy. Absolutely affects trim on boat. Can manage it to extent you can move weight to forward storage... else you’ll need to run with some tabs.
- cowlings are robust, also a Pro... taking side cowlings off to do oil changes, spark plugs, medium pressure fuel filter takes some time. If just the top cowling to check oil, its a breeze.

If the noise wasn't an issue I would say a complete home run. I’m working on a cutting board that can swivel and incorporates some sound deadening / reflective material to reduce this issue. Tests knock down the DB ~5-10 and its like a richter scale where the scale is exponential... so could resolve that issue.

Time will tell, but my impression is they are going to be very durable.
This is a great comparison, thank you

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