Cavitation Problem on 27" toons with Yamaha 115
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I have a 2015 Sweetwater 2286 FCS with the 27 toons and lifting strakes and a 115 Yamaha.
I purchased my boat at the end of summer last year so I only got to use it a couple months. I love this pontoon boat. My only complaint is the cavitation issue I experienced a couple times. there is virtually no headroom in trimming the engine while underway. Especially if I have anyone sit in front of the helm.
I am getting ready to get my boat back in the water in the next week or two. I will wait and see what happens.0 -
I had my SW 240 DF raised after the shaft was extended. I still have issue ,but think it's slippage instead of Cav. now. Had them clean the tubes and told them to replace the propeller hub if there was any doubt. Read someone had same problem but after replacing what appear to be a good hub problem went away. ShoeDoctor: I think you have the same issue as I had before shaft extension was installed. Many have an issue with the 27 inch tubes have to get it lower. Like you said trim is useless. I know if I still have problem I'll try different propellers. Problem is no trailer so dealer does all the work and it's $120 a pop just to raise or lower. Should be free, never was right. I'll let you know what results, hope you find a solution.
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I have a 2013 with the 27" toons, lifting strafs and Yam 115. My motor is mounted in the last hole. Just bought it and have had it out twice. It runs great and is faster than I expected. I have not had more than two people in it yet so we will see. I bought the whale tail but won't install it unless I too have the same problem0
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Update. With several people in the boat I have the same problem. 5000 rpm at 20mph and on the edge of blowing out. No grip in the water. I'm already in the last hole. Anybody found a real cure yet?
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Still an issue dealers hasn't corrected, but informed me they are in discussion with Sweetwater, and hope to have the means soon to correct problem. They did not try different props. My problem start around 4000 rpm, 70% of the time start slipping and can't exceed 16.2 mph. Sometimes by myself (not always) I can push to 6000 rpm 19.2 mph but the slipping is on off constantly and very noisy. With 6 persons onboard almost impossible to reach any speed over 12 mph without slipping and blow outs. Two years of true aggravation, I love the layout of my boat and in general I like my dealer. However the lack of urgency giving the investment is upsetting and can truly hurt a brand name. I can deal with the fact there’s a problem and even that it might take a while to resolve, but the lack of ongoing attention to resolve this is difficult to accept.
I be willing to sell back, and purchase a model configuration that hasn’t got this problem.
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I'm experiencing the same problem with 27" toons and lifting strikes with the 115 yamaha. I have been given suggestions, lowering motor, 4 blade prop, water glide and jack plate. Does anyone have a good result with any of these? Motor is in lowest position already.
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End of story I HOPE!
This is not the way I should have had to correct it (costly), but it worked, and after 2 years I just wanted it fixed.
Replaced 115hp with 150hp.
The 150 HP finally installed, and cavitation issue is gone. I was hoping to get better WOT Speed, but the ride was so sweet by comparison I'm just glad to be done with it. The service department claims they had it up to 33 GPS, I saw 31.8, but believe if well-trimmed 33 is likely there somewhere .Speaking of trim I can actually effectively use it now. Anyway I turned sharply into some wakes, and did multiple max turns and had no real detectable slippage, or cavitation.
I don't believe any attempt to determine best engine height was done, think they just went by the book. I'm sure with some effort 36 mph would be within reach, but as I said what a sweet ride by comparison, it felt like a big cat clawing up a tree instead of a spider trying to climb up a glass. Trolling speed is a little faster than I'd like, but not bad. I figure fuel consumption should be about the same because the 115hp was surely inefficient.
Anxious to see how she is with 6 or more onboard.
If the 6 person ride goes well, the fat lady can start singing.
Engine Yamaha LF150 (long shaft) I’m told they think Prop is Stainless Diameter: 14.5, Pitch: 13 cupped
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Seems like it is more than 1 cure to fix this problem. I have lowered mine to the 4th hole and only got a little relief. Trim is virtually useless, although I get a solid 30mph now. I think you need a jack plate used to lower instead of raise the 115 outboard due to the excess lift of the bigger diameter pontoons at speeds above 20mph or so? I like the idea of putting a shaft extension on and then raising the motor back up to the sweet spot. I just don't think there will be 1 sweet spot due to how much the pontoon raises after 20mph. The shaft extension would be a "fair" compromise or the jack plate would be a better solution at a higher price?
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For me the extension didn't really help that much, and still slipped. I lost about 9 mph or more top end with it too. It's weird but I don't think 115hp could handle the prop needed to eliminate all cavitation. I recently hand 12 adults onboard with about 7 coolers and these weren't small people. I had to be right on the 15 person limit and with the 150hp I was able to hit just above 19 mph with no slippage. I hated to have to eat the cost, but the performance of a L150 XA blows the 115 away and likely was the only true correction outside of having the transom mount replaced with the correct unit, and waiting another year with crossed fingers.
Good luck hope you fine an easier solution.
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It's not just with the yamahas. I have the 135 ****, 145 hp evenrude and am having the same issue. This will be my 3rd year with the boat, and it's still not right, less than 15 hours on the boat. 2015 sweet water premium 240sd with 27 inch toons and lifting strakes. I have had it raised, lowered, had the extension put on taken off, 4 different props, and now the 3 toon put on. Still not right. Last I heard they were taking off about 5 feet of the lifting strakes off. Haven't gotten word yet. Any one else heard of pulling strakes on and off?1
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Need advice....ordering new 2018 255 SDP slide boat this week. Two toon boat, comes with 27" toons for extra flotation given weight of swim roof deck. Anyone know if they changed/fixed something for 2017+ boats (seemed most were 2015/16 model years on this board) to prevent cavitation with 20" motor on 20" transom? I'm going with 115hp Merc command thrust but need to know whether to go 20" or 25" shaft. One dealer I talked to swears they always do 20" and have no issues and thinks 25" will run too deep/slow boat down even in top hole. Anyone have a 255 swim deck with a 115 (20" or 25") with opinions? Ideally I'd go with the 25" and could start with it in the top hole and adjust down as needed to minimize cavitation. Price is the same, just don't want to go 20" and run out of downward adjustment. Measurements would be great too.....specifically with a 25" in top mounting hole, how far is the motor cav plate below the transom pod on the boat. Same Q on the 20" shaft....how much adjustment below the transom pod do you have with the motor mounting holes? Thanks in advance.0
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i bought a 2018 SW2286 SB TT 25'' tubes with 150 hope no issues0
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Hey DDancers how has your pontoon boat been performing since you switched over to the Yamaha 150?0
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Update on my Sweetwater 2286 FCS Coastal Edition.
My 2017 boating season was pretty much a bust due to my elderly parent's unexpected medical needs so my cavation issue remains the same.
I dropped off my 2286 to the dealer on April 28th to once and for all get the cavation issue resolved. Here it is two months later and my boat is still there waiting on Godfrey to send the correct drive shaft for the extension kit. It took 8 weeks for the dealer to finally receive the kit (Friday June 23rd) only to discover that the shaft in the kit doesn't mate up to my shaft. I am a very patient man but this is ridiculous. I've lost two months of prime boating season with no resolution in sight.
My dealer contacted Godfrey Saturday June 24th so we will see what happens.
I will update this post as soon as I know something.
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I have been waiting for a left front corner piece for 7 weeks now on my 2015 2286
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