Hi Champion, I know the boats, they are awesome 👏 You can surface a normal alloy prop if you add some cupping ( I did a video on the channel about modifying an alloy prop if you’re interested). The only problem is that the pitch will be too low to get any good speeds and will also possibly rev the motor pretty high. I know they are expensive but Winrace props are the go. Also are you sticking with the 9.9 or going a larger HP? Cheers, Aussie Boat Guy 😎

@@25hpboatracerman ok thanks alot!!! Im just 13 so no larger Engine Are coming on it yet, Im trying to kinda prove to my dad that the boat should have a cleaver since the things you said and also because every other Winrace that I’ve seen has a cleaver. Thanks a lot and I love the conent!!!

Yeah, they are good motor for sure 👍 Cheers 🍻 Aussie Boat Guy 😎

Me neither 😂 I’m having a blast Cheers 🍻 Aussie Boat Guy 😎

Hi Mate, If it’s the USA Built 8hp, you cannot, I know the 15hp looks exactly the same but it has more capacity (cc). the 6hp and the 8hp are the same capacity and the 9.9hp and 15hp are the same. You could probably try a 15 carb and re-jet to suit your motor but it will take a bit of tweaking to get the mixture safe for your motor. Also not sure how much hp you will add, maybe 1/2 or so. Cheers, Aussie Boat Guy 😎

Hi Champ, The 6hp 4 stroke is a single cylinder yes but these are two strokes. The two stroke 6hp, 8hp and 9.8hp tohatsu are twin cylinder. Cheers, Aussie Boat Guy 😎

No problem 👍 All the best, Aussie Boat Guy 😎

A 3.5hp will push it no problem, just won’t be fast. I would say you may see 8 knots with one onboard and about 5 or 6 fully loaded. Cheers 🍻 Aussie Boat Guy 😎

Hi Champion, Yes your correct if it was a fishing boat setup but it would run a lot slower, I tried it like that before I modified the setup and it’s max speed was 38kph, I am now at 62.5kph. The propeller I am running now is specifically designed for surface piercing. if your interested search up surfacing propellers (cleaver and chopper) we use them on race boats, it goes against all logic initially but when you understand the way they work, it’s brilliant. Cheers 🍻 Aussie Boat Guy 😎

Hi Mate, Thanks for your comments 👍 I agree, I have come to learn that there is no hull speed with a planing hull. Sounds like you get to have a fun time with boats, awesome 🤩 Cheers 🍻 Aussie Boat Guy 😎

Hi Mate, Good comment but not true for performance setups. Yes the cav plate is normally set the the keel of the boat or even slightly lower and the propeller fully submerged does give better thrust but keep in mind that you can barefoot waterski at 50kph, water becomes quite hard at speed. So if you run full depth the propeller has a lot of friction and drag at speed and if you relieve some of that drag and friction you can actually run more pitch and get a much greater top speed. That motor did 38kph at standard depth and is now achieving 62.5kph, the numbers tell the take. Research surface piercing propellers and also look up Surface drive props on KZbin, some of my favorite videos ever. Cheers 🍻 Aussie Boat Guy 😎

@@25hpboatracerman if the prop breaks the surface it will scoop air and when it mixes air in the water it gives it less traction. Just like driving a car in snow with bald tires. It's all about traction. Did you ever experiment with a jet conversation ? All you need to do is build a round tube around the prop. They actually sell them for bigger motors and mercruiser out drives.

Hi Champ, Please please please look at F1 boats and the way they run their propellers if you really want to expand your knowledge. You are correct for a normal boat setup and when I first came across surfacing props it went against everything I had learned but it is a faster way to run. If running the propeller full depth was faster then all race boats would have them submerged but it is not the case. Some setups actually run more than half of the propeller out of the water as there is enough bite just with one blade in at a time at speed. I really do encourage you to search surfacing propellers, it is super interesting and blew my mind when I looked into it. Also worth a look at the Arneston drive video on KZbin, one of my favorite videos, the one where the footage is looking at two props out the back. Please let me know how you go? Cheers 🍻 Aussie Boat Guy 😎

Thanks! Champion 👍 All the best, Aussie Boat Guy 😎

Hi Mate, It’s a surfacing propeller, designed to run 1/2 out like that. It has a different blade shape and some cupping plus good rake on the blades. Cheers, Aussie Boat Guy 😎

Hi Mate, You can just add the low pickups like in the video and assemble the lower unit as usual. Obviously if you modify the whole motor (porting, high comp head, big carb) it will perform even better. You can check out the other mods I did to that motor on the channel if you’d interested. Cheers 🍻 Aussie Boat Guy 😎

@@25hpboatracerman thanks mate. Btw i have 60hp yamaha. Searching for big carb that can just PNP with it and bit of porting.

Hi Champion, Yes they are metric. Cheers 🍻 Aussie Boat Guy 😎

Hi Mate, Thanks for your comments 👍 Mt prop is a three blade, haven’t tried a two blade as don’t think the revs are there for a two blade after the 2.08 to 1 gear ratio. Cheers 🍻 Aussie Boat Guy 😎

Hi Mate, Yes I did, it’s two part primer followed by two part gloss paint, finish is actually better than new factory and used reproduction decals. Cheers 🍻 Aussie Boat Guy 😎

@@25hpboatracerman yeah the finish is amazing, is this just out of a can?

@@yahnpavlovic9626 Hi Mate, It’s Two part paint, you need to mix two parts and use a spray gun. The finish from a can is not as good and also the paint from a can is not as hard wearing and can be affected by fuel or oils Cheers 🍻 Aussie Boat Guy

Hi Mate, That’s a shame, they are great motors but it does sound like it’s in its last days. Probably needs a re-build or see if you can get another one, they do come up for bargain buys from time to time, may be cheaper than re-building. Cheers 🍻 Aussie Boat Guy 😎

@@25hpboatracerman well shit its 5 days old the fucker gave me it for 150 bucks running '' great'' the carb rich screw was turned 110% out and no spark top cylinder replaced cdi and carb from old engine and runs great now its gonna blow shiiiit (it just sounds kinda metaly clanky not super horrible but concerning)

@@Diesr Well for $150, just send it and see I guess 🤷‍♂️ Cheers, Aussie Boat Guy 😎

@@25hpboatracerman that’s some spirit 😃

Hi Mate, Yeah it is, I really don’t think it’s a manufacturing issue though. It is more likely people forgetting to run oil in their fuel (seen that a few times with people) or overheating due to not keeping maintenance up on the water pump or thermostat. Also overheating due to bags of picking up weed. They are truly one of the strongest motors I know, they just want fuel with oil and cooling water and your set. Cheers 🍻 Aussie Boat Guy 😎

@@25hpboatracerman thnx for the reply Mate. Yes I totally agree. I like these motors too, but picked up a bad one ,bought it on a boat . want to fix it so bad because everything else is in good shape ,I'm trying to find parts ,but this powerhead or parts is hard to find in the netherlands. But love your video's, i keep watching. Love the prop and tuning videos . 👌

Hi Mate, Not too sure what you’re asking? Cheers 🍻 Aussie Boat Guy 😎

I replaced my water pump, works with drill but won't pump water when I assemble it, only smoke or steam along with exhaust pulses come out the pee hole

Or show the route the water takes thought the engine, I'm sure the pump is pumping water but idk where its going There's not any blockages, I blew through it both directions with air

Hi Mate, Thanks for your comments 👍 Sounds like fun and please keep us posted with your results. Cheers 🍻 Aussie Boat Guy 😎

Hi Mate, The 58 Evinrude is a beautiful motor, i don’t know how much more power you can get. You may start with a 25 to 35hp omc carburetor but probably won’t just bolt straight up. Cheers 🍻 Aussie Boat Guy 😎

Hai teman, Saya senang videonya dapat membantu. Bersulang, Pria Perahu Australia 😎

Thanks Champion 👍 God bless you too 😊

Hi Mate, Basically it is for small outboard boats that are running surface piercing race propellers to take the thrust and attain the perfect trim setting. No much use for a standard outboard setup. Cheers 🍻 Aussie Boat Guy 😎

Hi Champion, Glad it was helpful! thanks for your comments. Cheers 🍻 Aussie Boat Guy 😎

Hi Mate, I understand that it may look that way but if you view the section of video where I video the starboard side of the motor you can see both the telltale and trunk cooling with massive flow. Cheers 🍻 Aussie Boat Guy 😎

Hi Mate, that’s awesome 🤩 love the old Quintrex. Normally start with about 2 degrees but listen for and pinging. The old 35 mercs are not the fastest motors out there as they are a low revving engine from factory, nice motors all the same though. Cheers 🍻 Aussie Boat Guy 😎

The most likely reason is blocked carburetor jets. I would start with a Carburetor overhaul, follow along with this video and see if it fixes it. You need to remove jets, don’t skip sections, if any junk is in the carb it will not run. It can look clean in there but may not be. Cheers 🍻 Aussie Boat Guy 😎

Hi Champion, Yes, correct 👍 On a proper setup with the appropriate surfacing prop, you reduce drag by having less prop blades in the water, less gearcase, less skeg etc and can increase top end speed a whole heap as you can increase the pitch because less drag. Remember water gets pretty hard at speed so the grip is there. You can barefoot waterski at about 50kph for reference. Cheers 🍻 Aussie Boat Guy 😎

@@25hpboatracerman Good stuff ! Thanks for the response and the knowledge.

Too easy champion

Hi Champion, Yes, the same just some different parts as you can see in the comparison video. Also the stator stop on the 9.8hp is different too. Cheers 🍻 Aussie Boat Guys 😎

Great idea! Thanks for your support and for the input. I will Definitely check out how to do that. Cheers 🍻 Aussie Boat Guy 😎

Cheers mate 🍻 so much fun All the best, Aussie Boat Guy 😎

@25hpboatracerman love it!!! Cheers bud!!!! 🇦🇺🇺🇲

Hola amigo, Lamentablemente no tengo un taller público. Salud, Chico del barco australiano 😁

So true, I have found the Japan built Mercury (really Tohatsu painted black with Mercury stickers) for the under 60hp are super powerful and reliable. I am impressed too mate. Cheers 🍻 Aussie Boat Guy 😎

Hi Mate, I always install them the way they were taken out. It depends on what motor you are working on too, I have seen them different ways. On Japan built tohatsu - Mercury they are often flat side to the top at the top of the motor and flat side to the top on the bottom of the motor too. Which make and hp are you working on? Cheers 🍻 Aussie Boat Guy 😎

Hi ABG, It's a 2003 Tohatsu 3.5hp 2 stroke single cylinder which I'm rebuilding from the crank up. When I took the 2 bearing seals off it looked to me that one flat face was facing the bearing, and the other one the flat face was facing away from the bearing on the other side of the crank which I thought was strange. Also do you know the torque settings for all the powerhead and cylinder head bolts, I've looked in the service manual but it doesn't specify?

Hi Champion, Me too 😂 Got one sitting in bits in the Garrage, I really want to finish my seawasp boat build first, too many exciting projects. Cheers 🍻 Aussie Boat Guy 😎

Hi Mate, I don’t do any dental work, only motors 👍 I do know some people use a dental drill for porting small motors. The purpose of porting is too increase the flow of the motor and increase power. Allowing better flow of air and fuel mix into the combustion chamber and also the better flow of exhaust gases out increases engine performance. Cheers 🍻 Aussie Boat Guy 😎

You're welcome All the best, Aussie Boat Guy 😎

Hi Mate, Agreed 👍 I was surprised at the difference it made modifying that little motor. Cheers 🍻 Aussie Boat Guy 😎

Hi Mate, Very true, and mine is 👍 Cheers 🍻 Aussie Boat Guy 😎

Love this! Great shots so we can see how it runs through the water. What did you use to shape the cone?

Sure Champion Sand paper, acetone, paper towels, Flowcoat, talc or recommended thickening powder from your fiberglass supplier where you buy the Flowcoat, fiberglass polish, personal protective mask, goggles, clothing. Also you should see if there is a gel coat repair kit already made for you at the supplier, can make it even easier. Cheers 🍻 Aussie Boat Guy 😎

Hi Mate, It has most likely scuffed a bore (fingers crossed honing will sort but you won’t know till the head is removed) the piston will most likely need to be replaced as it will have scuffed sides and a new set of rings. Could need a bore but take the head off and check. Fibd out what caused the issue before rebuilding too do it doesn’t happen again, overheating? oil injection problem? should you remove the oil pump and run pre-mix? Cheers 🍻 Aussie Boat Guy 😎

@@25hpboatracerman can i use a sewer cam to see the inside of the cylinder? love your vid ty and thanks for your reply would love to try and rebuild one

Hi Mate, Sometimes, it is pretty hard to see what’s going on on the screen though. If the compression is 70 in one cylinder there is clearly a problem unfortunately. It’s up to you though, if it’s running ok then you could consider just using it. Cheers 🍻 Aussie Boat Guy 😎

Hi Mate, Thanks for you encouragement 😁 Your negative battery wire will attach to your block somewhere, there will be a specific lug and nut directly on your block. Cheers 🍻 Aussie Boat Guy 😎

Hi Champion, Glad you liked it and found it helpful. Thanks for your comment. All the best, Aussie Boat Guy 😎

Lots of fun work 👍 Cheers 🍻 Aussie Boat Guy 😎

Thank you! Cheers! Aussie Boat Guy 😎

Hi Mate, the thrust block has no issue with the leg sticking to it when trying to turn, we used to use them on our wing boats for racing too, really good way to set the perfect trim. you must have the nylon part where the motor meets the block so it can move easily Cheers 🍻 Aussie Boat Guy 😎

@@25hpboatracermanif it does become a problem use Teflon tape or a Teflon block it’s slippery as hell and works great but maybe extra friction is what you want to not jolt the motor at speed 😅

Great motors, carb overhaul, new impeller and most likely your set. Cheers 🍻 Aussie Boat Guy 😎

Hi Mate, It likely changes with most motors, I tend to shave about 20 though off some of my stock heads as a start. Some the squish is to close to the piston to shave any off without re-turning the squish. on some motors I remove the head gasket, re-bolt the head on gently and check squish with that thickness removed as a start. Cheers 🍻 Aussie Boat Guy