50mph with 10hp! 8' Mini Hydroplane Project: Finish Hull & Mercury Kiekhaefer Racing KG7 Outboard
ฝัง
- เผยแพร่เมื่อ 28 ก.ค. 2024
- 50mph with 10hp! This is the third episode of my mini 3-point hydroplane series.
I’ll show you how I finished restoring the hull with 8 coats of epoxy, and then dive into the super rad, crazy rare Kiekhaefer Mercury racing outboard I have for this thing. I’m definitely not an expert by any means, so I’m learning a ton as I get this thing ready to rip this summer. If you have any more information that could help me, please leave it in the comments below!
Check out this pretty rad documentary about the designer of this boat here:
• The Life Of William D ...
It's only 8 feet long and about 4 feet wide, but this little thing should hit 40-50mph when properly set up, and the sensation of speed being only inches from the water should make it seem like 100mph. Although it's in pretty great condition, there are a couple things I want to do to it before I get her wet; watch the video for my plans on refinishing the hull with a trick graphite and epoxy coating to reduce drag, and rebuild the steering area to improve the aesthetics.
Hopefully watching this will help convince people to tackle their own boat restorations; it's dirty work sometimes but it's not too complex or challenging, so please leave a message if you have any questions and I'll try to help.
If you liked this video or learned something, please check out some of my other videos and stay tuned for updates to the SST project!
Products used in this video; clicking them supports my channel but doesn't cost you a penny, cheers!
Go Pro Hero 9 Black: amzn.to/3usDFhD
2 Pack Fiberglass Resin: amzn.to/3vXyaYL
Graphite Powder 1 Quart: amzn.to/3ewVd6D
Fiberglass Cloth: amzn.to/2Rgr2Yf
Fiberglass Resin: amzn.to/3ePG7s0
#hydroplane #mercuryke7 #kiekhaefermercury - แนวปฏิบัติและการใช้ชีวิต
It sticks because there's no flywheel nut in the hole! Put it back on the motor so that the dogs catch on the nut, and then the nut should turn. Also, the dogs need heavy grease, not thin lubricant. The flywheel nut needs grease too. I was rebuilding these things in the 70's!
I was going to say the same thing, a lot of the older pull start engines had grease to lubricate it, also not tightening it down to extremes may help.
Same here Bro, Class A & B stock hydro and Runabout. Early 70s A.P.B.A. racing. P.S. I get a kick out of this (can build one in my sleep) from the ground up.
My childhood tells me you got a Hydroplane 3 point. A mini Max is a little boat that can be made from a single sheet of plywood. My Uncle would take me out on his Mini Max with a 1955, 7.5hp Evinrude. The kid with a Johnson race motor had the loud pipes on a Three Point Hydro Plane.
I am building these to start a race class in michigan again. Wooden, 8 foot x 4 foot wide limits and horsepower limits. I raced this class as a kid and want the same fun for my kids and grandkids.
big question is standard outboards or race stuff
Use a Cratex bit to scar up inside those low spots. Then use micro balloons to thicken it up.
Try adding some shims under the plate. It could be locking the mechanism when you tighten it down
Those recoils can be an absolute pain in the ass! I prefer a tank at the steering bar a notched pulley on top of the crank and a pull rope that you have to wrap on the pulley every yank.
It’s beading up because of oil in the wood. You can wipe it down with mineral spirits before applying anything that will help.
Put the recoil on the motor. The pawls need to catch on the drive nut on the flywheel.
Thank you!
Exactly what I was going to say. The pawls need to spring outward and grab the find on the flywheel. Works similar to the pull on the stihl you got. I'm a saw guy too. I own 9. Combination of Stihl and Husky. Cool old unit. Thanks for sharing.
@@psavel274 Should get a kiekhaefer chainsaw to complete the collection :P
Simply put a washer between the plate that it is rubbing against. This acts as a spacer.
greetings good content in your recordings ,I'm from Wisconsin success
Gonna. Be. ALOT. Of. Fun!
dang those things are pretty wild
Really cool👍👍minus the recoil starter...
Bubbling from temp and humidity would be my guess or potentially from some sort of contamination in the material but a bad ass little build for sure
Between each coat, wipe down with denatured alcohol. Should help with the issues with the adhesion of the additional coats participating.
I’ve had that issue with epoxy before. I switched to 105/207, and that sees to have made that into a thing of the past. Sometimes spraying IPA over it helps for me also.
Just came across boat and motor that sat in neighbors basement for 40+ years. Beginning research on both and looking for suggestions and videos like yours. Mercury KG.7 Super "10" Hurricane motor, and have not dug out boat yet,
Carl would be proud.
Hahaha, my friend and his dad built a hydro from plans obtained from popular mechanics in the 80’s and that used a 10hp Johnson, we had all kinds of fun with that thing and it hauled balls.
So 14-16hp with a surface drive should be bananas :D
I wonder what a vtec engine would do on a small boat, whoohaha!! ;)
Thanks for another video dude, great stuff!
That would be cool!
The epoxy keeps beading up because there's a contaminant in the wood. Most likely its oil. You need to use rubbing alcohol on those spots to clean the wood. Then brush in epoxy on the spots to seal it. O. The pull start assembly I'll bet you its no longer engaging on the flywheel nut. Take the old nut off get a new nut and torque it on. If you still have the same issue get a couple of LOCK TOOTH WASHERS (not lock washers). Take the nut off and put the washers on then the nut. Torque nut tight then put pull start assembly back on making sure that the jaws aren't in the way of the nut getting in between the jaws. It should now properly engage n start motor.
You should build some air traps on the hydro for more speed. Is that a KG4? That tank ring looks like a kg4. 7s had a fin that said hurricane too. Nice !
That’s the plan would like to get a base line run to see how much speed the traps add
Good Day : I've only once viewed the original design of the true "Sea Flee" . Oddly enough the original design was a one man sail boat . This was from an old copy of boat builder magazine . The shape was very close to the mini max , just a little longer . It's very interesting to your build !
I actually just found the plans to this boat a little while ago, next episode will have the full article from which this was obviously built from. Stay tuned, want to get this thing in the water soon but still waiting on my gearcase
maybe those little things that block the pull start have to squeeze the motor to spin
Put 3 thin washers between the plate
Your problem is with the recoil spring. Either it has broken or one end has come loss. First, remove the pull line handle so that you can work on the recoil assembly. Just pop the cap off and untie the knot. Then you can remove the rope spindle off the shaft. Pay attention to the recoil spring. If you aren't careful, it will unwind and blowup in your face.
The fisheyes in the resin are from surface contaminants. Dish soap is okay for removing some oils, but it's inadequately by itself to prepare the surface. I like to follow up with alcohol and then acetone. Lacquer thinner and xylene also work well. You have to verify that acetone will not damage the existing finish before applying. Test some dried epoxy to make sure that it doesn't soften it.
Spring is definitely not broken, it pulls it back in fine. It just won't let the rope out.
@@ADDvanced I've gone through the issue you're having many times and it's always the spring. Typically, an end breaks off. The springs are hardened and VERY brittle. Sometimes the problem is with a piece breaking off a casting that is supposed to retain one end of the spring.
The fact that there is still some preload to retract the pull rope does not in anyway indicate that there is not a problem with the spring.
@@ADDvanced It's also possible that your spring has some rust issues which has fused parts of it together and is restricting its range.
Not sure what epoxy you are using, I like the West System.
👍
Oil coming out of the wood would make those marks.
Honestly this was unexpected.
Does this have a custom pitch prop? The higher speed would be well out of range of standard props.
Yes it is a race prop designed to be surface piercing
TotalBoat TotalProtect Epoxy Barrier Coat System in white
looks like the to plate (the one that when removed made it work) might need some lube (NOT P Blaster!!! ) AND torque it to spec NOT an air ratchet that made it way too tight IMNHO
It turned out to be it needed the crank pawl nut, or the teeth just hit themselves and lock up.
real old mercury
47-52 somewhere.... the engine that put Mercury on the map
Not a Minimax. Like you said it's a 3 pt hydro. Which should be faster than a Minimax which is a monohull. The 3 pt should have less hull in the water thus less resistance. In the 50s we had a Minimost type hull running a 10 hp Hurricane with the quicksilver lower. Could never get more than about 32 mph. Unfortunately the throttle stuck wide open and steering wheel came off in Dad's hands and he flipped it. With the throttle stuck wide open it sucked water in and destroyed the block. I was about 12 and used to run up and down the river alone.
Wear a helmet bud. Why not a layer of roving tho? Edit. The fish eyes are from the woods sap. Try to spray the epoxy next time. Harbor freight conventional gun with a 2.0 tip works fine and $30 is easy to throw away if you can’t clean it quick enough
That would add weight, this thing needs as little weight as possible to perform well.
@@ADDvanced if it cracks I promise I won’t say told you so. I dig your videos. Just found them today. Keep em coming.
never mind been drinking with the recoil, your on very powerful drugs if you think your going to be doing 50mph with that motor and boat,,,,
This is what a lot of the racers are saying on hydroracer.net, how fast do you think it'll go?
I would put some washers to raise the plate up