In-Depth Tohatsu (Mercury) 20HP Outboard Top Speed Test on 1448 Weldbilt Jon Boat
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- Опубликовано: 18 сен 2022
- Hello guys, thanks for tuning in to another episode of Fishing Is Therapy! In this episode I will be performing an in-depth speed test on my Tohatsu (Mercury) 20HP Outboard EFI Long Shaft 20in on a 1448 Weldbilt Jon Boat. Stay tuned as we explore new geography, new lakes, rivers and bodies of water in the state of Georgia. I will be targeting multiple species of fish, including largemouth bass, crappie, bluegill, sunfish, catfish and etc. I hope that you find this video useful and therapeutic! Because………. Fishing Is Therapy, Get That Therapy Boyyyyyy!!
#FISHING IS THERAPY!!!!
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Glad to see a confident man in the outdoors. Smart man too. Way over my head with the analytics about boats. I'm confident in turning to you for advice. Thank you man
Appreciate that man. Happy to offer any advice. Glad you enjoyed the content.
Great vid! Thank you for your time!!!
Thank you for taking the time to watch and support. Greatly appreciated!
That was fun to watch.
Glad you enjoyed it.
You need an 9.25 by 11p prop. Try a solas amita 3. They make props for tohatsu. Your rpms need to be at 5750 minimum to make a full 20hp . I know the range is 5400-6100 but you want 5750 or more. 12p is over proped.
Your right. I realized that. When I run by myself I need an 11p. When I am with one buddy I am now running a 10p on 9p depending on load, but I definitely run a 9p with 2 buddies.
Weight really does make a huge difference.
My ancient 5hp 2-stroke is able to push me, my son, and a loaded cooler/gear at 12.5mph… I have not played with the prop yet. I will tweak it a bit while I save up for a bigger motor.
Saw a guy on another channel with his 1436 (what size line is) and a 20hp hitting over 30mph.
All that being said… I just want a platform that moves at a decent speed to get me to my fishing spots. Even 12.5 is plenty for that.
Yeah I have seen those videos, and would love to get that mph. I plan to DIY a tiller extension and move my seat more to center to offset the boat planning out. I believe this may be why I'm loosing top end speed. It never truly planes when myself and a buddy are in my boat but I get around 17-18mph.
I love your boat man. I maxed that same Tohatsu 20 at 23 mph.
Thanks man. What type of boat are you running with your Tohatsu?
I’ve got a 2001 Lowe boat 1648 riveted with a 25 hp tohatsu and I run 22-25 mph depending on if I’m on the lake(rarely) or in current (saltwater flats). That’s with 3 people, 52 liter artic cooler and a 80lb thrust Minn Kota Terrova, 6 gal fuel tank. The 11 pitch runs about 5500rpm and my 10 pitch puts me at about 6150rpm but the 10 pitch runs like a sprint car. Don’t worry about a couple mph we all want our boats to go just a little bit faster lol. I run a lithium for the trolling motor. Expensive but worth every penny.
I totally agree. My problem was my rpms were under 5400 with a 10p and 12p. Havent tried and 11 but but with the jackplate, 10p and all my gear and a buddy im around 20mph but by myself im pushing 24ish with rpms in the mid range.
Nice rig. That’s allllllll you need for a great time
Yes indeed. So far it has been nothing but great times and I'm sure more great times to come.
Hello and good video. Im very interested in getting myself a Tohatsu 20hp short shaft. Really enjoyed watching. Atb Steve 👍
Hey Steve. Thanks, appreciate you watching and I am glad you enjoyed the video. You can't go wrong with a tohatsu 20hp, it has been a year and I love the outboard motor more each time I take it out.
Great 👍
Good stuff
Thanks Wuilson!
Thank you for this video I was thinking going with a 20hp engine you made my mind up I need at least 25-40hp
Yes, if I could do it over I would have went with a 30hp for heavier loads. What size boat do you have?
I have a 4 m long Finnish made fiberglass boat from the 70´s. Pretty light. I don´t know the exact weight, but I´d guess around 100 kg. I´ve been playing with props and I get about 54 kph. Pretty much the same with a modified 12" prop and a pretty standard 14" prop. The 12" gets on a plane faster but revs out at close to 6000. 14" prop is a bit slower to get on a plane, but revs to about 5600. 20 hp Yamaha 2-stroke DEO Autolube from about -90 with the exhaust bored out. I think I´ll cut the 14" a bit and maybe modify the cylinder head a bit. A solid 55 kph with a good holeshot would be enough. I have trim tabs fitted and ran the tests alone with about 30 kg of fuel, oars and basic gear. Without trim tabs the boat is scary, but could do another maybe 5 kph faster. I tried it and almost tore the stern off. After that I braced it quite a bit more. With extra 200 kg I still get about 45..48 kph. But I wish boats would have two gears at least, one to take off and one to to cruise.
Exactly, that would be great to have on an outboard. It would make fine tuning this process so much easier. I'm glad to hear you are getting good performance, I think we all want to squeeze as much speed out of the bait as possible.
My 2016 mercury 20hp runs best with a 9p Solas on a 1548 Alweld Tunnel haul. I run constantly 22-23mph @ 5800 RPM. By myself I’m around 750 pounds loaded. When I put a buddy in the boat I get 18-19mph. I was like you trying every trim level and prop until I got it right. Good video
Yeah it's a process. Glad you have your dialed in. How is your weight distribution? Heavy I'm the bow?
@@fishingistherapy I have a group 27 battery with small anchor, Tolling motor and 6gal tank up front. Back is my cranking battery gear and me. I’m a big guy 6,4” 290 so that’s how I have to keep my gear on the opposite side that I sit and drive to get peak performance. If a buddy comes he sits opposite of me upfront. It crazy how running these small boats you have to figure out what’s best. My 20 came with trim so it helps me dial it in faster with a load. I also put a hydro foil fin and I gained 2 mph with that 9 pitch.
I am think about adding a hydrofoil myself to bring my transom up.
@@fishingistherapy it definitely helped me out. Stingray Jr. is what I used.
@@CfRlCajunfishRiplipsThanks I will definitely look into them. I think they could help alot.
Hello! I appreciate that you use safety lock :)
Yes, I like to use every safety precaution I can. Appreciate you watching and that you noticed that.
Thanks for the video, this is the best one i've seen on this motor, where did you find the RPM/HR gauge?, my 1975 25 Evinrude died on me last week and i'm thinking about getting one of these. motors. P.S. i caught a lot of bluegill on that lake floating crickets about 2 ft deep fishing next to house boats @ the end of the marina's and many catfish using pieces of shrimp on the bottom when i lived in Canton in the early to late 90's.😁👍
Man it's been hard to catch catfish consistently in recent years but the bluegill are still abundant. Thanks, glad you like the video. I got the Tachometer on Amazon. Here is the link : Runleader Digital Hour Meter... www.amazon.com/dp/B01FYXX3C4?ref=ppx_pop_mob_ap_share
Based on your RPMs, looks like you need an 11. With your 9, you were too high in RPMs, with the 10, you were right on the line, if you were to take any significant weight out of the boat, you would also be too high. With the 12, you're lugging the engine, which is terrible for it. Try the Solas amita prop, i just put one on my Yamaha 25 2 stroke and picked up about 1.5 mph over the stock prop, both are same size and pitch. You could also try messing with engine height, that makes a difference. Cook video man
Thanks for the valuable info. Going to try and 11p to see what numbers I get.
I like what you did with your flooring material, are you happy with it?
I want to do something similar with My Lund after i make a casting
platform on the bow.
..It's my understanding that stainless steel props give more
top end speed and plane faster, not sure though with smaller motors.
We are running the same size motors, if you ever decided to try a
stainless prop, I would love to know what you think.
I have heard the same, but have not heard much about using a stainless on a 20hp and jon boat. I have not tried it yet. Thanks regarding the flooring. I am really satisfied with it. Going to be putting out a 1 year update really soon.
I reckon shutting that seat down next to you might buy a couple more knots. It's like a wind break slowing you down.
Great observation. The chair does play a part. I gained a 1mph more.
Once again a really nice video.
Your boat looks great.
Why are you so concerned with the speed?
Try looking at the symmetry of your wake. That will tell the story. Also you talk about pitch but don’t mention Diameter of your prop.
I think speed is for speed boats not JBoats.
I would look at weight distribution, keeping port seat down (wind drag) and loading boat 60-65% on port side with your weight on Starboard side off setting it.
Once again great video, be safe and forget the speed look for efficiency going through the water.
Remember the wake should be symmetrical very important for efficiency and safety.
Sir. My very best.
Great insight and advice. Yeah my wake is not very symmetrical due to my weight. I'm concerned with the speed only to achieve optimal speed and rpms within the proper range. I have either high speed and low rpm or vice versa. My diameter of prop is 10.5in. I am working on weight distribution which changes based on passengers. I noticed the seat and drag it caused when I watched the video back. I will implement the load distribution more to the port sight. I have it distributed more toward transom and bow. Appreciate all you said and will take it all in. Thanks.
@@fishingistherapy once again great comments and now that I know dia of prop I will send you a link to vid of one of my boats I build them as a hobby.
I sit o starboard side with left hand on tiller.
When you see the video you will see my weight distribution. I now run a smaller dia prop but a 4 blade. My boat with me weighs 1200 pounds and I run a 9.9 2 stroke on this boat. I still get to about 15 mph.
I believe you have a great way with the camera and will do very well keep it up. You look like a very nice man with a passion for the water. That Tahatsu engine is a very high quality product and I have visited there facility in Japan.
I also have lectured to Mercury and Evinrude / Johnson. RIP two great brands gone now.
I will send the video along as an attachment.
My very best sir,
Ira
@@primsolllineguy8689 Yeah that's great speed for the boat weight to motor ratio. I don't see the link yet. If it gives you issues send it via Instagram to my fishing is therapy account. It sucks that those brands are gone now, but we still have great brands left. I appreciate your wisdom and insight. Thanks for the compliment I will definitely keep going and growing with my content and love for the sport.
Actually I think I got the link now. Going to watch it.
Man, I find it hard to troll at anything over 20 mph !
Are you running a lead acid battery up front for your trolling motor? If so you might want to consider a lithium as it will greatly decrease weight off the front. A 12v trolling motor only needs around a 60ah lithium for all day fishing. They do cost more but if you can bite the bullet on the initial cost I'm sure you'll see better speeds from your outboard. Tight Lines
Your right. Do you think 100lbs will increase mph by much. They lead acid battery is around 50lbs. I have one in the rear as well for electronics and starting the outboard
@@fishingistherapy So the lithium I have for my motor up front is 15 pounds. I probably would only switch that one for now if i were you as the starter battery you use for the outboard shouldn't run off a lithium. So you could cut around 35 pounds up front which is a good start. The batteries also last much longer and give optimum performance on the trolling motor
@@bobsmalls100 my research states that every 10lbs on the Bow reduces speed by 1mph and every 100lbs on the rear reduces 1mph. Do you find this to be accurate?
@@fishingistherapy Sounds about right but I'm not 100% sure. I took 90 pounds out of the front of my jon boat and got about 4 more mph
@@bobsmalls100 Do you have a Flat bottom?
Your Boat will get up on plane faster and better all around performance
with a *9 or 10 pitch prop. Solas makes great props with bigger prop blades
to push more water at the correct pitch.
I run a 9.25 diameter 9pitch prop with a couple buddies and a 10p by myself. I only use Solas. They have awesome props. What do you currently run?
Hi again, I have a 12ft starcraft with a 2 stroke 15hp johnson. The stock prop was slow to plane. I changed it to a flatter pitch solas and it screams now...Also I have a 14 ft lund with a 20hp Merc. I have not compared props with that.
..And a 17 ft Montaulk Boston Whaler, does well with 70 hp.@@fishingistherapy
...and an old 16ft skeeter bass boat with a 40hp 2 stroke, Yamaha does about 35 mph.
@Bob's Adventures / Projects Wow thats a nice collection. It looks like you have all your motors dialed in very well. I am going to experiment with prop diameters.
The 1542 WeldBilt might be a little faster than the 1448 WeldBilt with the 20hp Tohatsu. You might call Backwoods Landing and ask them what they recommend in getting a little extra speed out of your boat.
Yeah I talked to Jeremy and he recommended I raise it a 1/4 inch each time after playing with the trim level and prop type. Since my rpm's are low going 22mph, the 11pitch prop shoukd bring me between the rpm range and give me atleast 1 maybe 2 mph more.
Jeremy knows what he’s talking about. I’m sure he can help you.
I trust his wisdom. I will be trying the 11 pitch prop, aiming for that 24mph soon.
It would be nice if you could find a cheap “CMC Tilt and Trim” to dial it in.
@@Byron4RollTide Yeah I'm thinking about getting one. It would make it alot easier than adding shims.
Tohatsu (Mercury/Honda). There. Fixed it.
Thanks, exactly right!
@@fishingistherapy Tohatsu has the corner on the 9.9 to 20 hp engines with those other two brands. Honda in turn, makes all of the Tohatsu 200 to 250 model lineup. It all works for me.
@poseidon5003 OK that makes sense. Love the motor, Tohatsu and Honda produce quality outboards.
Where did you get that meter guage? To measure rpm’s?is that right I’m new sorry? 😂
Great question, it's a Tachometer, I got it off Amazon. Here is the link.
www.amazon.com/dp/B01FYXX3C4?ref=ppx_pop_mob_ap_share
Hey what’s up brotha….i noticed I could hear a slight rattle when you were running and my Tohatsu does the same…have you ever found out what it comes from?
Yeah not sure where it comes from. Something internal that doesn't affect performance but I'm always listening for it to change but after almost a year no change through a season if hard running. What do you think it could be?
@@fishingistherapy I had some people tell me what it could be on the Tohatsu Owner FB group….I have 2023 20hp…some ppl saying it’s the pull start, clamp knobs or the shift rod…not really trippin though since it doesn’t effect performance…heard Mercs do this too
Yeah as long as performance is great I'm satisfied. I love the way my 20 starts everytime and runs efficiently!
What app are you using to measure you speed.
It's called GPS Speedometer. The app icon has 84mph in light blue letters on it. Here is the link : play.google.com/store/apps/details?id=gps.speedometer.digihud.odometer
Try a Jack plate!
Thanks for the tip, I did install one. Check out that video. Going to do an updated speed test soon.
Man I just want to get about 15 mph minimum out of my boat. That would get me to some spots I want to fish pretty quick lol
I feel you Dakota. I'm just trying to get maximum efficiency out of the motor. I think I'm still getting great speed, I can't complain, just want the rpms and mph to match, because it isn't working as efficiently as it could which hurts my gas milage and strains the motor over time. But dude I love how quickly I can get from on spot to another vs on my kayak.
@@fishingistherapy I feel that! I love seeing something run as efficiently as possible!
Yeah, looking forward to seeing your setup on the water and running strong.
@@fishingistherapy me too lol allot harder than I expected lol
Oh it definitely is. Once o started down this path I found that our quickly. But it's still worth it in the end.
My tohatsu 18hp on fiberglass boat 14feet speed is 52kmh
Didn't know tohatsu made an 18hp. I thought it was either 15 or 20hp in that range. Seems like you have you setup rigged perfectly
Mercury/tohatsu/
Yes sir! Same motor under 30hp
The goal tomorrow is to catch fish. 🤣 22 is my number that is the speed for us to catch fish🤣🤣
Nice. Great number. Hope it brings luck.
It's faster than my kayak
Yeah I can't complain just trying to optimize the motor for maximum efficiency. But it's still fun to change paces and get on the yak.
@@fishingistherapy I definitely got what you were doing. I just made sure to comment for algorithms. You are the most entertaining fishing channel on RUclips. I'm just doing what I can to help you grow.
You know I appreciate that alot. You know it's the name of the game youtube algorithm game.
Them new motors are slow
I can understand where your coming from, but they are more efficient, lightweight and you dont have to mix fuel and etc. Have you done any tests to see the speed difference in a 20hp old vs new?
My 1982 15hp will smoke this thing lol
🤣🤣Put that 15hp on my boat and lets see how fast you go.
Dude, you're going to wear that engine out for nothing.
Thanks for watching. Engine is still running strong.
That unused seat is acting like a parachute. Fold it down next test.
Thanks great tip. I was thinking it had a negative effect on my performance. I have removed it since then and have same an improvement.
Boat is too heavy. You need more power for more speed. I have 1436 with a 15 Suzuki that sees 24 mph just me (270lbs) and my gear. Besides it's a Jon boat not a speed boat.
Your right. It is heavy but very sturdy, I will sacrifice speed for that, but if I see a good deal to upgrade the outboard I will jump on it.
@@fishingistherapy I was also thinking that with you running the pin in the outward most hole, the boat should have wanted to porpoise. It seems like you have a lot of weight toward the front causing more the hull to stay on the water after plain. Maybe you could redistribute some weight?
@@bryanwilliams4620 I need to try that. When I have a buddy in the boat, sitting in the back with me it struggles to get on plan, but when I have my buddy sit in the front it planes out nice and gets over 20mph.
@@fishingistherapy That's sorta what I was thinking. If your buddy could sit toward the front when you get on plane but move toward the back or middle after you get on plane see if there is difference between the two. With weight forward, it will get out of the hole easier but after it planes out the front of the boat should rise a little then the RPM increase and boat goes faster. With weight forward the front of the hull stays on the water and plows along. You want to see water spray out from under your boat about in the middle. If it sprays out toward the front that's part of what is slowing you down. That's why big motors have power trim. Push the nose down to get out of the hole then raise the front for less drag more speed. I had a deck setup in my jon and it made it too heavy up front so I took it out. It behaved about like yours is now. I'm not an expert just my own findings with trial and error. If you're happy with your setup just go with it and try not to focus on how fast it is. I don't think you'll get much more speed with that motor. Good luck!
Bryan that's makes total sense and is very insightful. Those are the things I noticed and have been thinking when operating the boat. I have realized changing from a 9p prop when I have 2 people helps alot and my 10p when it's just me or a lighter person helps as well. It's a fine tuning process but overall I get good mph for my uses and it doesn't stop me from catching good fish! So I'm happy.