StingRay XRIII Hydrofoil Stabilizers for Boat Motors
Installed it on a Merc 115 hp. Did not take 5 minutes as claimed.
Torque tab mounting bolt was too short with the stabilizer in place. Had to replace it with a longer one, with meant a trip to the hardware store.
Once in place, the prop hit the torque tab. Had to modify the tab to clear the prop.
In the water, my Nitro now comes up on plane very quickly. It seems to provide a better ride in rough water. Haven't noticed any fuel economy so far on the first tank of gas.
Top end dropped nearly 5 mph. This is disappointing but I can live with it.
I think the price is high considering that it is little more than a piece of molded plastic.
I would recommend it to someone who is prepaired to do a little extra work, but only if your boat has a serious problem getting on plane.
July 4, 2007
To start off I was a bit nervous about purchasing this product due to the wide variance in review opinions, but decided to give it a try and form my own from personal experience. It installed quickly and easily on my 2008 Mercury 150hp EFI. Even though the install seemed very solid with just the sacrificial anode (I did use the supplied loctite) I used the 2 small bolts drilled through the cavitation plate just to be sure. The boat is a 2008 Tracker Targa V185, primarily a fishing boat but also used to tube and ski on a local river. Prior to installing the XPRiii I had issues with the boat getting on plane quickly when pulling a skier or a tube, or when loaded with 4 guys waiting to get to the next fishing spot. The control at top end was pretty sloppy too with alot of chinewalking and cavitation when turning. The first use after install was to take a bunch of 20 somethings tubing on the Allegheny River. I have to say I was very impressed with how quick it got on plane and how it would stay on plane at much lower speeds than previously possible. Probably the biggest apparant upside was the vastly improved control at higher speeds and the excellent 'bite' the boat now has when making tight turns at speed, it used to cavitate so badly in a turn that I would lose enough speed to often go off plane. While I did seem to lose about 2 mph from the top speed my 'sweet spot' cruising speed of about 38 mph is now maintained at around 3900 RPM where it would previously need to be at about 4200 RPM. This would lead me to believe the fuel efficiency will be improved a bit, maybe not the 30% some report to have acheived but with a 150 HP gas guzzler every little bit helps. After about 5 hours of running up and down the river we trailered the boat to take it home. I checked the security of the sacrificial anode when we pulled the boat out and it was still very tight. Very pleased so far! The second test was a week of fishing in the back waters of the Georgian Bay near Parry Sound, Ontario. We stayed at a fishing lodge about 12 miles from the Marina and the boat got on plane impressively fast with 4 men and all their gear, she was able to make 42 mph with a full load! If you are familiar with this area it consists of a vast number of coves, channels and bays that provide a great variety of fishing spots and a challenging waterway for any boat due to the large number of shallow submerged rocks and boulders. For us fisherman the key is getting to the desired spot quickly and safely, fishing it hard and moving quickly to the next spot. The XPRiii did not disappoint, everything experienced on the river translated to our fishing experience as well. No sign of any weakness in the product or mounting. I will have to conduct some more tests to see what kind of overall fuel savings the product is contributing too. A full season will tell on the durability of the product and the mounting. I would definitely recommend this product from my experience!
July 5, 2010
waste of money
I installed this hydrofoil on my 2005 Mercury OptiMax ProXS. Problem number one: it uses the anode to hold the fin on the motor. The bold isn't long enough and just try to find that bolt with the small hex head to fit into the hole on top of the lower unit. Impossible!!! Problem number two: it has two slots on the foward end so you can drill holes in the lower unit fin, if you wish. However, the slots are too far outward from the fin on this motor. So no hole drilling is possible. Result???? $150 on the bottom of the lake. The anode bolt apperently vibrated loose. And with no anode, you have no hydrofoil. I am going to submit this to the manufacturer just to see if they will comment.
April 8, 2011
installed on a stern drive 3.0L.Used it for the first time on a lake with four people in the boat. Didnt change much on planeing out the boat. Took the boat back to the dock and the hydrofoil had broken off.I installed it accourding to the instructions.Not very happy after spending $119.00 on this product.
June 27, 2007