I Blew Up a Modified Predator 420 Mud Motor
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- Опубликовано: 1 окт 2024
- I Blew Up a Modified Predator 420 Mud Motor
After spending over 2 months building out this powerful 420 Predator mud motor, adding tons of modifications, and making more horsepower I blew the engine! Follow along as we tear down the Predator mud motor and figure out what I broke this time. And as always don't forget to stick around to the end of the video for the bloopers and the hater's corner!
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Red beards garage has built some nice predator engines
I don't have red beards garage money. I wish I did.
Hmm, ya add bolt on mods yet run stock lower end. And rev it up to almost twice the max rpm. Not too swift in the old brain are you Scooter? Why would a 3600 rpm motor turn 6000 rpm? Do you think it is a conspiracy against you? They sell you a high performance motor dirt cheap and lied to you about it capabilities? Nope, they told you the truth, come on Skippy, it does not even have rod bearings. I am coming over and removing the rod bearings from your poser pickup because real motors don't use sissy ass rod bearings.
All joking aside. It needs rod bearings and get rid of stock flywheel. It is balanced for max 3600 rpm. I have seen more than one fly apart at 4000+ rpm.
Hey it is a lawn mower and pressure washer engine. Just sits there and runs at a steady rpm well below max speed.
Yeah Yeah I know.... lesson learned.
Check out red beards garage he builds these small motors up all the time lots of good information on his RUclips channel brother
Been watching him for years... but I don't have his deep pockets or sponsors willing to give me bookoos of money and parts.
@@SendItJonBoats me to brother I just buy one part at a time lol
Cast rods , cast piston will not take high revs .
Old time wrench from the 60s and 70s . Most every high performance engine will blow eventually 🤣. Watch high revving without a load . 👍
Funny that I ran 5k rpms for years on all my mud motors and never had an issue.... 6k rpms is apparently the limit. LOL
Hey man, would love to see videos on these cheaper outboards on Amazon & alibaba. There are no videos out on them!
Comming at some point. I want to test the amazon version.
High revving cast parts long enough and somethings gonna break. Plus side is it didn't catch on fire. Be safe. Haters corner is good stuff.
I would have thought the cast parts would last longer than 10 minutes LOL. Guess I was wrong!
Buy a new crank and a ARC billet rod, install a billet flywheel. Remove the governor and tap & plug the holes.
Never over rev a predator engine without an ARC rod. Never remove the governor without a billet rod . The rod was the problem.
Hey my man you really don't wanna run royal purple in these engines I've blown up 2 pretty expensive 212s because of royal purple and a few other friends have had similar problems from running royal purple.
Im glad you said something, I have been reading some forums with people complaining about royal purple, and I wasn't sure if I should believe it or not... but you convinced me! Thanks
Just trying to spread the word
A number of things could have happened with the rod and crank. The most likely is an improperly installed bolt. It could have also had a poorly ground crank or debris stuck in bearing, starting a chain reaction. Getting your RPMs up to 6k might have been a contributing factor but it definitely wasn't the cause. Thanks for the video, glad to see I'm not the only one who has motors trying to spontaneously eat themselves.
That shaft is fine. You're seeing bearing transfer. Just sand it, polish it, and you'll be fine. The problem was that the bolt wasn't tightened down.
Really??? Oh man that is good to hear, I was freaking out trying to find a crank and they are almost as much as a new motor!
Do not sand a crank. You can reuse it but dont sand it.
Actually, I've used this method on several engines. It works great. The trick is to focus on the residue and since it comes off quickly, you end up with very little impact to the crank.
No! That crank has been overheated. That has ruined the heat treat on the metal and made it much softer. If you try to run it at high rpm’s it will fail. You need to replace it.
Muriatic Acid, Acid Brush and a little time to remove that aluminum from the steel crank! Rinse and then some Crocus Cloth to polish the crank pin.
What kind of exhaust pipe and muffler is that?
It is a Beaver Dam Mud Runner exhaust. They sell them on their website.
After all that work you don’t buy a forged rod? Can’t even fathom. Thats like spinning a small block to 8-9k. You need to think things through
Maybe this is a heads up moment, if you are building a high performance motor a person should go back and check all the factory torque specks just in case it was a Monday or Friday built motor . ???
This is why you have to replace the connecting rod to run at high rpm’s. Put in a billet rod and billet flywheel. If the flywheel fails we won’t get the chance to comment on a video because you’ll be dead.
So you said it took you 2.5 months to build this ... looks pretty stock to me so what exactly did you do ? The only thing I noticed that isn't stock is the exhaust , carb setup and roller rockers ...
Looks like the usual hotrod learners curve.
Dude you are speaking the truth. Some of us gotta learn the hard way.
Should have used a Honda GX390 instead of that Chinese junk. YT Channel Project Farm did a significant oil test series and the two finalist were Pennzoil synthetic and Amsoil synthetic maybe try one of those oils instead of royal purple, empirical testing always beats advertising
When youtube starts paying me enough to afford a honda I will use honda.
I am not paid by royal purple, would be nice but that's what I have always used and never had any issues until now. I will try amsoil next time.
Best boat size for 420cc?
1436 up to a 1748.
I need a predator 420 block
Might find a used one on bookface, but they are rare.
I have a question about the size of motor to use I live in ohio and alot of the lakes in my area are all 9.9 so you think a 6.5 would be ok on a 16 foot jon boat I want to duck hunt out of it not worried about speed can't get to the back water with regular motor thank you for any information just found your channel great videos!!!!
a 6.5 will push it, not fast at all but it will push your boat. I have done it on my 16ft boat
Hey bro,
#haters corner
Hey scooter I Need your advice, if I put a mud motor surface drive kit on my job boat, can I use it in fresh water and salt water? Or are they only made for trash water?
Also still waiting for that surface drive kit video lol 😂 love the videos man!
They will be okay in salt, just rinse with fresh water after you use it for sure.
Modding a Chinese engine that's competing on cost and putting it on a boat makes no sense. If your go-kart breaks, you can drive home. If your duck boat breaks out on the marsh, you're in for a fun time. Tinkering is fun, but on a boat if you want more power, buy a bigger motor.
That is not the point of this channel... we build stuff and see if it breaks. If I wanted to be safe I wouldn't have named it Safety Jon Boats instead of Send It.
@@SendItJonBoats break away then
Hey man, I just built a 22hp beaver dam longtail and I’m having an issue with the prop hopping out of the water and having to really wear myself out holding in. I went to the 8.5 prop and it was better but I have sacrificed a lot of speed with it. I’m looking for recommendations on how to keep it down so it rides in the water. I’ve used the trim tabs that are included but it’s not helping much. I bent the skeg and that seemed to help some. What should I try next I’d really like to use the 9 inch Because it pushed me at a good speed.
Transom could be too tall, which is the most common issue I see. 16 inches or less is the sweet spot. Also you can try loosening the shaft bolts and rotating the entire shaft in the direction you bent the skeg, that usually helps me. Also adjust the motor it sits as far back as possible so all the weight is on the tail. Try all of that and if it does not help then shoot me an email chris@tbnoutdoors.net
In a totally unrelated topic? Does your light bars make that front brush guard hot? Or do they have enough airflow to keep them cool?
Mine stay pretty cool, but I do not run them for long periods of time, just long enough to get where I am going and that's about it.
Use studs instead of bolts on the crank bearings, you can get more stretch out of stud, if you have the clearance.
I think studs are going to be a must have on all my builds now
Are you saying to use studs and tighten them up more? How much ft. Lbs.?
To the scooter talking about 9.5 hp outboards. They were only made late 60's- early 70's. Also 9.5s are great little motors, loved mine when it ran good.
Good to know... I thought I was going crazy for a minute, but now I know 9.5's were a real thing. I had never even heard of them,
Sorry about the motor, but hopping up a Chinese motor is kinda like putting nitrous on a Yugo. It'll work for a while.
Anything will work once! LOL. Thats what send it is for... I do dumb stuff so you dont have to wonder.
Engine was revving too high and it sound like sound like the somebody did not tighten down that boat to spec need to talk to Chang boss is at the factory he's going to be in deep mushu
LoL... is mushu the chinese word for deep doo doo? LMAO... I think it either rattled loose from the high rpms or it wasn't tight
G'day great video mate and great scooters in this video lol. Sucks about the mud motor but you can make it better.
Thanks bud. I will rebuild it and make it better.
Over rev for factory rods
Yup, I'm an idiot.
Love the vids! Always have wondered, are you a duck hunter? Would love to see a blind build and set up video.
Thanks for watching. Yes I duck hunt when I can, lately been too busy with boats to hunt much. I think we are going to start working on a DIY duck blind kit soon, as well as some other products.
You’ve got to do a haters corner video!!
Just put all of them together if it’s 5 min or 45min your the only person I’ve seen that does it and some of your reply’s are so freakin funny
LOL one of these days I will
Where do you buy all of your upgrade parts from
I don't know if that's a stock rod or not but I can tell you I ran five hp flat head Briggs tiller engines that were modified to rev to 9k at 28 hp back in the 80s ...We ran a billet rod made by Horseman ...for Kart racing ....they called there rod unbreakable ....As we no nothing is ever Un breakable or Unsinkable but they are tough ....When you build another clearance the bottom end loose as if it's half worn out ....it will free it up alot and the rod company I mentioned comes with a rod bearing similar to a small block Chevy rod bearing....We also ran a two stroke oil in the crankcase on our in our four stroke crankcase ....The reason we did was it gets very watery when hot and less drag on bottom end yet lubrication is still good but we did change the oil every 15 laps ...On a mud motor I don't think I would do that but I would change whatever oil you use after each time your in the water ..,..As always good video !! Good luck .....see about a billet rod they are three times more thick and last ...you may have to grind the block in one spot so the big rod has clearance ....it's hard to say bc I've not built a predator motor..
i will for sure be going to a billet rod after this. They make them for the predators.
@@SendItJonBoats Send me a link to your other videos don't you do some type of paintings and coatings? I would like to check them out .....I may love Jon boats but currently carving a rock for a bathroom sink lol....So would love to check out your other stuff that like me funds the ole Jon boats ....keep up the great videos s....love em...!!!!!!!!
" tons of mods " should have included a rod
If your rod wasn't so short you could have actually knocked the bottom out of it.
LMAO, it seems like I have heard that before. LOL
I dig the "engine- nuity" with the Predator...
Now.... Use a Ghost! Basically a race motor Honda clone for go karts...but! Not sure they are 400+ on size...but seems to be pretty badass!
I just luv the whole boat you got going on here. Good stuff
I have not tried the ghost yet. I need to jump on that.
@@SendItJonBoats lol... HOLD on, it's my understanding they got some juice.
And a bit torquey.
Enjoy, good luck if you grab a ghost and go for it sir
So sorry your motor blew up after all that work. But I know you will build it back stronger and faster. Looking forward to seeing the new and improved version on the water when you get it done.
Thanks bud, can't wait to get it back together because it was a crazy strong build!
He built it with the build back better plan 😂
@@Kevin-ve2ck Now thats funny right there! Lets go Brandon!
Not sure where we are going but let’s go
After further review . I shall recant.
200-212-2whatever.. definitely not big enough...
Yeah I got to stay with the big block stuff for this build. I am doing something really stupid for an upcoming video.
@@SendItJonBoats wow...really stupid huh...
Please review the Predator 459 and are there any mods I can get. Awesome channel 👍
I will do that when I get one in
Shit happens. Check out Go Power Sports for parts to rebuild it. Also check out Red Beard's Garage on RUclips. He builds these motors from mild to wild. Can't wait to see what you do with it.
I have seen Red Beards, followed him for years. I doubt he would even talk to me being that he is a much bigger youtuber than I am.
@@SendItJonBoats Dude, he just put a mud motor together for a buddy of his.
I bet he would point you to the best parts.
@@swampcritterisbackbaby1740 I cant afford the parts he uses, because I am not sponsored by any of these art companies. He gets mega bucks in parts to build those motors. Send it is all self funded and we broke!!!
looking like no oil pressure
Where can I purchase a exhaust pipe like that one for my 420? Thanks brother
At this point, EVERYONE should see the difference between Chinese version and original Japanese HONDA. As much money he dumped on it, could've gotten the real deal. If I've learned anything in my life, the Japanese know their metals, and engines. Honda in particular. Performance from factory vastly better than Chinese versions and definitely more dependable.
Could’ve bought a Honda for 4 times the price and wouldn’t make the same hp as a built predator
Oh I know Honda is better quality than anything out there.... but I don't have Honda money.... I got harbor freight money.
@@SendItJonBoats I feel it man. I only got that scrap yard picking and rebuild a little at a time money. 😂
@@thenhoutdoorsman4612 only if you trust the number on the motor. Honda has way more power than a China of the same "hp". Plus it would still be running. It's an expensive anchor if it doesn't.
Hit up Red Beard’s Garage or Cars and Cameras. They build predators all the time.
Those guys get flooded with emails and messages, they would never respond to me. I am just a little speck in the youtube world.
@@SendItJonBoats he is building a John boat with his son with a mud motor now. So he might be very interested in your knowledge.
Most say don't loctite rod bolts but with stock rod I do. Check torque on any new engine
Where did you purchase that exhaust muffler for your predator 420 ? Love your videos, Keep up the great work!
Took my stock 670 running wide open with 8x5 prop was turning 4 to 4100 rpm,
Somewhere in the 17 18 mph range
Put a 8x6 prop wide open turning 3600rpms, 20 to 21 in lake water little chop,
I feel a lot better about it
Not a fan of overreving a lawnmower engine
I had never had any issues until this. I have yet to own a mud motor that I did not spin at least 4800 rpms. Then this happened so I am re-evaluating my life choices lol
@@SendItJonBoats lol, don’t you have a 670 rig, I thought you had one, or did you blow that one up too,, lol
Anywho,
I think I had told you that I had the old 57 inch crawdad frame godevil which I mounted the 670 on, with a heavy alweld 1542, and I am getting those speeds, with a long kit from sps I would probably get close to 30 with the rite prop,but the speed I’m getting is good enough until this frame gives up, and I figure I got it dialed in rite, cause I can sit down and pretty much steer and control it like an outboard, which makes it cheesy
@@clayton203 Yeah i still got the 670... I was doing this for a special project. Still going to do it, I got 2 other 420's to play with.
@@SendItJonBoats I gotcha, what about the big v twin, man you need to put a longtail shaft on that thing, I bet it will rock,
Me personally I will never go back to a regular outboard, way overpriced, and they won’t suck mud for cooling,
keep strokn dude, I like watching your vids,,a lot of funny stuff, 👍🏻
Come on man. Everybody knows you have to put KY in the oil of those motors to get proper lubrication. Or use those scooter tears cause their use to being screwed 🤷♂️🇺🇸🎣
mannnnnn why did I not think to add KY and scooter tears!!!! Good thinking!
@@SendItJonBoats it’s the perfect lubricant for friction. You could probably get 7000 rpm’s out of it
@@Kevin-ve2ck LMAO
I thought you was a certified RUclips builder but your cheap ass buys Harbor Freight tools. Good job scooter
Did you fix it?
“Haters corner”
Hey scooter When are you going to post part 2 of the homemade mud motor surface drive video that you started 7 months ago and never finished?
Ps: love the videos man!
Still working on it dude, the shop has been a little bit on the crazy side and I have not had time to mess with it. It will be coming up soon though
@@SendItJonBoats yeah I figured y’all were busy as hell, thanks for all the great videos and info. Really helped me with my build!
@@NastyNate-fn6od Busy is an understatement! It has been nuts. I am slowly getting back to filming, might take a while but I will get all these projects knocked out eventually.
@@SendItJonBoats hell yeah man, looking forward to the upcoming videos. Seriously helped me with my build
You will build it back better, you kill me with the haters corner! 😅
Yeah man, hope I can get it back running soon!
@@SendItJonBoats No doubt that you will!
I know what happened, motor went bye bye.
Oh she gone for sure!
Welp you sure let the smoke out of that one!! Chit happens. It could have been doomed from the beginning as in you got a defective one or maybe it couldn't take the higher revs by design. Just curious if you do any kind of break in when you do a motor like this or just giv'er from the start? Looking forward to seeing chapter 2 on this one!
I usually break them in by running them on a longtail without any mods. Regular governor at 3800rpms max and just run it like normal. This is one of the engines we used for the 3 way review video so it had about 2 hours of run time on it.
@@SendItJonBoats Please keep in mind to do a small re-break-in cycle after internal mods(with the exception of governor removal) lol
Only saying cause I’m seeing a bunch of channels skip break-in cycles and blowing stuff up lol
@@NN1Ckl. YEs for sure will do a break in. I left the governor in this one for a reason, I am still thinking the bolt just wasnt tight enough
@@SendItJonBoats I’m having to agree with ya on that.
Idr if you did it or not, but swap the flywheel for a billet aluminum one once you remove the governor there Bossman.
I’ve grenaded a few stock flywheels over 5k 😂
good job scooter you blew it up hahahahahahahaha
Yeah that one is gone
Billet crank, rod and flywheel!
THem billet parts start adding up quick. I think just a billet rod and keep the rpms under 6k for now will be fine.
You sent it a little to hard ehh
Just a little! LOL
You should do an airboat build.
Dude I want to so badly! I got an idea for one and I will make a video series on it at some point.
Hard on them rods are ya?
TOo much friction on the rod... may need more lube!
Rebuild it and send it.
Yee Yee... thats the plan. We shall see what happens.
stroker crank!
I wish! Them things are so expensive!
yea get it girl!
Yee Yee!!!
I say throw a ls on it. It will move 😁
Everyone wants to put an LS on anything... of course LOL
@@SendItJonBoats I had another idea...... chainsaw maybe a paddle wheel setup...... I also had to order a "RUclips master boat builder" shirt. And for once shipping didn't equal the same as the shirt. So thank you for that.
@@nathanbillingsley42 Ohhh a paddel wheel set up would be cool on a small boat! I love those shirts dude, I got 2 and wear them all the time.
At this point slap a stroker crank (if there is one) in it and call it good. 😅
They do have a stroker crank but its stupid expensive... like 500 bucks.
Why is the governor still in there lol?? 😂
For a break in I would use some cheap conventional and a zinc modifier. Royal purple isn't good from what I've heard especially on small engines. I've always heard on these predators you shouldn't ever run synthetic for break in.
This one was already broke in with cheap conventional oil last year. Had about 3 or 4 hours on it.
It's still good send me a email I will tell what to do.
email me chris@tbnoutdoors.net