Time for repowering my 336 Canyon

PlannedOutage

PlannedOutage

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Canyon 336
Hi all,

I own a 2008 Canyon 336 with the OEM F350As from the GW factory of the same vintage. The dreaded F350 powerhead failure on my 2008 F350A starboard motor finally bit me and I am dry docked for a while. Therefore, it is time to repower my vessel. Any other Grady 33 owners repowered your vessels? If so, what did you go with and are you happy with your choice vs the original OEM motors that you had before?

Thank you in advance for any info that you can provide to help a fellow Grady owner!
 
I'm not a 336 Canyon owner, nor do I have any experience with them, but I do always enjoy talking about horsepower numbers, gph/mpg burned, top speed and so on. For me it also comes down to your boating/fishing needs, budget and so forth. If you look at the Grady White website and check out your 336 Canyon boat on there, it'll give you all the specs you need for a couple of different outboard configurations. If you want to do 50mph+ then there are two options... the first would be triple Yamaha 300's which will give you a top speed of 55.8mph at 5,900rpm but you'll also be burning almost 80gph of fuel while at those speeds. The other option is twin Yamaha 425's that'll get you WOT at 53.1mph @ 6,000rpm and also burning 72gph while at those speeds. The third option, at least for brand new Grady's would be twin Yamaha 300's which gives you a top speed of 44.8mph @ 6,000rpm and only burning 51.5gph fuel while at WOT. In just about any sized boat, and especially a 33 footer, I definitely don't need to be going over 45mph, and definitely not 55.8mph at WOT. Those would be options for Yamaha's, and I'm sure someone will be along soon to give you their opinion on them re-powering their own boat, but another option would be Suzuki. If/when I need to re-power it'll be with Suzuki for costing considerably less money, having a better warranty, great customer service and so forth. They make a Suzuki DF350 that I'm thinking with twins you'd be pretty happy with, especially since I think those early F350's were quite heavy at around 800lbs a piece? The Suzuki's are less weight than that as well as considerably lighter than having twin F425's on the back.
 
I repowered my "old"" 330 Express recently with 250 Yamaha's. I'm happy, but we're talking apples and oranges compared to your higher horsepower hull. I just hope you're able to find motors in this screwed up pandemic market!
 
I recently repowered my 330 express from 3.3L F250s to 4.2L F300s. Very happy! A big improvement. Same hull as yours and probably 1000# heavier. The 250s were a bit under powered and the 300s seem a lot more powerful! Grady White has performance bulletins for your boat with twin 300s, triple 300s and twin 425s. https://www.gradywhite.com/build/builder-steps/?p=6067
I'd look and compare. Note the trips use a higher pitch prop. I used 17P props versus GWs 15P as standard. If efficiency is a major concern for you, using more pitch than what GW uses can help with that. I don't need to ever go really fast and seldom have conditions to do so. The trips show slightly better efficiency than twin 300s, but I doubt you'd ever see the benefit thru the entire operating range. You definitely would never pay off the extra engine and associated maintenance. The 425s seem to have a good reputation, but not a proven design like the 300s. For me, twin 300s would be my choice hands down!
 
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I have a 336 with twin Suzuki 350s. Great option. Now have about 700 hours and they have been very good. Port transmission had a bit of metal in the lower unit magnets; Suzuki rebuilt the lower unit at their cost. It has been awesome. Great performance.
 
scott furman said:
I have a 336 with twin Suzuki 350s. Great option. Now have about 700 hours and they have been very good. Port transmission had a bit of metal in the lower unit magnets; Suzuki rebuilt the lower unit at their cost. It has been awesome. Great performance.
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Now have over 900 hours on the twin Suzukis. They have been reliable. Only issue was with the one lower unit, but since replacement there have been zero issues. I go on long (75 mile) runs offshore and troll all day. 20% more efficient that my F350s on the identical boat.
 
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Thanks for the follow up.

I am in the process to repower my 306 Canyon and options are
Honda BF350 what would be awesome but heavy and would 90% not tilt LU out of the water
Suzuki DF300 great outboard and i know them in and out

Twin DF350 would be a option too, but here they are about 3K more expensive than the Honda BF350 so i do not consider them, but thanks for sharing your experience as many have a wrong impression about the DF350 regarding the first series lower unit problems.

Chris
 
brdawg2001 said:
Hard to beat zukes for gradys...the gearing is more favorable for the heavier hulls...700 hours on my df250s
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Yep!
That is what makes me lean towards the DF300AP as i consider them enough powerful for the 306 and the cost me 16K less than twin BF350 and 20K less then twin DF350.
I had twin DF300AP on my deep v Venture 34 with full tower and thats a big and heavy boat and the Zuke's did just fine, actually more than fine.

Chris
 
Suzuki DF350's are $20k more than the DF300AP's? That seems quite absurd.
 
Mustang65fbk said:
Suzuki DF350's are $20k more than the DF300AP's? That seems quite absurd.
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Unfortunately the truth, the dual prop plus the bigger engine lead to that.
I have not asked how much the DF300B dual prop is, but as it's a depowered DF350 my guess is that's still crazy expensive over the DF300AP. I totally agree that the dual props do a excellent work and i would buy them immediately if extra cost would be reasonable, but 10K more per outboard is not reasonable for me. I understand that the dual prop is more expensive to build, but a reasonable higher price would had lead to much more sold units as many private users are not willing to fork out this massive extra cost.

43K twin DF300AP
59K twin BF350
64K twin DF350
ll prices above include controls, gauges and props, derigging of F300 and rigging new engines 1500$

Chris
 
Chris, are those prices USD or Euros?
If USD, that's a heck of a deal for twin 300 aps.
 
The price is in Euros, but Euro and US$ is more or less 1:1 and the quote i got is from my friend who is Sardinias biggest Suzuki and Honda dealer and i bought many things from him. I expect that a walk-in client would pay about 10% more.
US has MSRP and variable sales tax what can influence cost considerable, in Europe we don't have MSRP binding and sales tax is VAT and in Italy 22% and that may make outboards cheaper than in US. But knowing US costs a bit i wonder about the sometimes astronomical rigging costs by certain dealerships as i know very well what time frame is required to pull old engines and install twins, and that is doable in one day by 3-4 experienced workers. Pulling outboards can be awkward when factory zip tied engine cables together with boat cables inside the conduits what makes it impossible to pull them for later use if engines get installed on a different boat. So pulling a/the engines is difficult to estimate and can take longer than expected what may rise the total rigging cost.

If you are interested in Suzuki then i suggest you to contact Outboard Specialities in Pompano Beach for best price on Suzuki outboards and a extremely wide knowledge about them. 2017 i bought two DF300AP in crates from them and they prepared and programmed the electronics so that i just had to bolt them on, pull the cables and connect the labeled plugs. For the few problems i had with the original round SMIS gauges they replied always fast and with a immense knowledge. I visited them twice nd Mike one of the owners brought me personally parts to Costa Rica when e came for a Suzuki Incentive event.

Chris
 
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