Isn’t your hull designed to plane? I’d think you’d get better mileage at cruise on plane then you would just plowing water.

thats a planing hull its at its most efficient when its out of the water. the diesel engines would have been tuned so that they were at their most efficient at a high teen / low 20 knot cruising speed most probably. where the hull is out of the water as much as possible so under least resistance.

The real question is how long has that marina been double dipping and subletting your slip for knowing your boat was away. Pretty sure legally, depending on the contract, you’d be entitled to any money they collected plus fees.

Rivas hulls are designed to plane. A good crusing speed would be around 23 knots(about 26mph) as at 10mph the boat is pushing the water rather than getting on it. Also i suggest instaling a pair of RACOR filters.

You might want to consider getting your navigations lights fixed before you go out at night again! That is very sketchy. I understand that you are learning but you need to get your prep on point and get the lights, sonar and radar dialed.

Definitely fix your running lights and get some paper charts. I’m sure the boat spotting you was letting you know they didn’t see any running lights. Things can turn bad on the water quickly if you’re not prepared. Good series though and looking forward to see what’s next.

Man talk about commitment😅 3 year journey from Diesel, to blown, to stranded, to lsx swapped, to fixed and then all the way back home and you actually documented all of it really well too. Not to mention all the money and time spent like its amazing you guys accomplished it and filmed it all to show us. So shout out to you guys, it really makes all these other KZfaq builds and projects that people don't finish or document most of look bad 😅😅

You’d be more fuel efficient if you get on plane. Which requires you to go faster, the bow will lift then lower by itself. And you can use the trim tabs to balance and level you out

Ironically, from the way you described it, you put the speed at the least fuel efficient speed... generally, fuel efficiency is the same between boats and cars with the best is efficiency is with slow speeds. But there is one difference. The plane. Boats get the worst fuel efficiency just below plane, and the best just above. So the slow vs fast is split between two group, and the separator is the plane.

I'm very curious what you will find out about the boat that was parked in your spot. Please let us know in the next episode ;)

You should probably put marine fuel filter/separators on. The dont get clogged with sediment as easily because it settles at the bottom of the bowl. As, water separation doesn't hurt. Not uncommon to get water in fuel.

Let us know how the dock situation goes, I would say they owe you some free dock time at the very least, this has been a challenging project and you guys have conquered the hard part, addressing the luxury part will be a lot of fun, definitely a lot less stressful, although it's not cheap you might want to consider new props that are better suited for your current power train as they will help with fuel efficiency and over all performance, outstanding job on this whole project.

Another great video. Dont skimp on the videos of the continuing work on the boat. Odd as it may seem a lot of us really enjoy seeing it come together.

9:45 I believe when a plain hull plains it’s at its most efficient.. if it is a displacement hull then you’ve got the right thoughts..

Unless you are idling along and sightseeing, stay in the marked sea channels. Also many times the shallowest water can be next to the channels due to dredging and the bottom soil dropped at the outer edges of the channel.

Gonna join the chorus here. You are much more efficient on plane than you are plowing water. Your best cruise will NOT be at top speed but once on the water instead of IN the water find where your engines/props work best. Also this was mentioned early on in your boat adventure but you really should have a depth finder and a MARINE GPS. Have fun with the Riva and be safe on the water.

It's fun to watch you make all the mistakes we all made when we got our first boat. One thought: if your concerned about the cost of fuel, you probably don't want a boat

I was always told that the more the boat is out of the water the more efficient it is, and that is why some of the big boats when they really get moving basically just a little bit of the boat is actually in the water?

Your new to boating so ill let alot alip but you are going to learn alot hard and fast about all your mistakes that weve all learned the same way. My best advice listen to the comment section and let us guide you in your journey. Were not all trying to be dicks. Never the less great channel, keep it going.

Things learned: 1) Yes, you can LS swap your yacht 2) Don't let Chris navigate 3) Let Oscar navigate 😆

Definitely need to have some handheld spotlights and/or floodlights.

Have a diver check your props and shafts. Something could be bent or damaged from running aground. Did you have Nav lights bc it did not look like it. Definitely do some learning bc things can go wrong fast on a boat. You have some big boats and difficult conditions so it would be cool for you to learn some things. Might motivate some others to do the same. Glad you got home! Fun to see you overcome all the problems too

B is for Beached 😂👍

No compass, no backup charts, risking a night passage with a boat that isn't 100% sorted. So reckless. Did you even have working navigation lights? Lucky weather was so good. OH AND HE RAN AGROUND!? Fuck me...

22:13 I mean this in the most wholesome way possible, she’s adorable.

In boating you typically measure usage in hours rather than miles. It’s a lot more difficult to track distance on a boat so most maintenance and fuel usage is measured by time rather than distance

You know since they park another boat in your spot I would definitely make sure you get some sort of compensation on the price.

The shots of Oscar watching the big boats was so wholesome, I too love big boats. Congrats on the run home to PDX!

Been following for four years and just wanted to congratulate you and everyone that has worked on bringing the boat back to life!

This has been a super compelling series to watch. So much life happened during this project. Spokane Washington and THE GREAT PACIFIC NORTHWEST IS VERY PROUD OF YOU GUYS!

I love this series because I get to experience all the headache of owning a boat without spending the money. I wanted a boat but the more research I did the less I wanted one. The best days are apparently “The day you buy and the day you sell” 😂

Look at marine fuel filters, two things you will notice, they are big and they include water separators.

19:10 love the chris fix tag on the sparco backpack, you guys are TOO CUTE!!!

As someone actively in the CG yes we are in the river. Also, use your radio to make a call out for help. The most we would do would be putting out a broadcast for you initially.

I think the reason I subbed to your channel so long ago when you became a youtuber is that ya kinda make decisions on the fly when stuff happens. Thanks for all the dedication. I have been a fan since the lotus build.

Fabricater meets boat. Boat meets bottom of the river. Those are some great engines if you can get them more or less trouble free. Excited to see what's next for the boat. And B is for Build will come thru!

I've been watching your progress, however I did not see any changes to your propellers. If those are the original props, they are not correct for the LSs. But you can easily determine which way to go with Dia and Pitch by running WOT. But you are going to have to get those EFIs right first. (Either 1" of diameter or 1" in Pitch will move your RPMs approx 400)

From one boat owner to another, get yourself a set of NMEA200 fuel flow sensors and hook them into the GARMIN. Tells you exactly how much fuel you're using, along with your GPS MPG. It is really useful for finding out the most efficient rpms to run at.

I would love to see a top speed run with this LSX engines in the boat😢

Wouldn't it make sense to use the trim for higher speeds? That brings the front of the boat back down a bit and you should be significantly faster and more economical?

Some people around there should pitch in and get a bunch of those cheap little solar lights like some people put down the side of walkways and stick one on each of those abandoned boats so that everyone will know where they are after dark.

1 - you need to be on plane to get the best economy, the old diesels would have been running at around 2000ish rpm to be at cruising speed, this is unlikely to be the same with the new LS engine’s due to power and more importantly torque curve, some experimenting with RPM’s and prop pitch required. 2 - if you beached, you need to check your props for damage, although I should think the props need to be replaced as per point 1 so that you have props matched to the new characteristics of the boat with those gasoline engines. Also - GET A DEPTH FINDER 3 - Your fuel problem is probably because the gasoline is effectively cleaning out all the diesel gunk from the old fuel tank, the lines could also be deteriorating based on the age of the boat. This is likely to be a problem for a short period of time. I would personally replace all the fuel lines as a safety precaution as they are old.

For best fuel efficiency you need to get the boat on plain. This gets the most of the boat out of the water creating less drag and better efficiency.

Thanks for bringing us along on the trip? Also let us know how the marina thing works out.

Follow your track on the Garmin to retrace course in reverse, as long as tide not lower you can’t go wrong (next time 😁)

Congrats on getting the boat home! I was a naysayer in the beginning, and still think LS engines in a boat of this size is a backwards step. It did make for good content and they did a pretty decent job on it, but something as interesting, or more so would be an LMM Duramax swap-in. Gas engines in boats that size are looked down upon in the boating community. Only the bottom of the barrel manufactures make (or made) gas engines in boats over 30', think Carver, Maxum, Sea Ray, etc. A Duramax swapped Riva would be cool. Still, this came out way better than I thought it would.

Great episode. I deal with the stress of shallow water here on Lake Erie. You can be out in the middle of the lake and run aground. Be thankful you didnt damage your props. You may want to take a peek just in case.

FYI, the Columbia experiences tides all the way to Portland. Generally less that a foot at PDX, 2 ~ 4 feet at St Helens. Those Islands and channels change constantly, you don't know til you get there. There's a reason boats tend to stay in the channel.

you should pickup a handheld spotlight for the boat.

Things you need: 1) vhf radio 2) Seatow/BoatUS (like AAA for boats) 3) Compass 4) Paper charts 5) Nav lights You’re being really unsafe not just for yourself, but other boaters. I like the series, not the unnecessary risks.

Stoked that it's working! I have no idea why but the boat series is among my favorite on this channel. Hope to see more coming!

The episode we've all been waiting for 🙂 Awesome job to the whole crew and glad to see her back in her home port!

I'd love to see more boat content.

This has been badass to watch yall do, couple of notes though as someone who works small boats and tugs for a living. Oil diapers (white ones) will be your bestfriend, that paired with some electrical tape will allow you to track any kind of leak very reliably. And bring extras of almost everything you can think of. It costs a pretty penny to do so. But the amount of times having extra filters, hoses, fittings, bilge pumps, wiring, etc... has saved my ass is unreal. Hope to keep seeing yall learn and enjoy your journey on the yacht project.

1. Fuel consumption - the (old) rule of thumb for gas engines in boating is 0.29 liter per hp per hour. And yes, there are (or at least existed in the past) boat manufacturers that used gas engines for the type of boat you have because the gas engines are cheaper. 2. Fuel efficiency - displacement hulls are most efficient at slow displacement speeds, planing hulls are most efficient at slow planing speeds. IFF engine, gear box and prop are correctly sized. 3. It's a long way until you get a reliable long lasting setup. For sure content for many episodes ;)

Awesome project and must give a shout out to your determination - kudos!

Loving the boat content!

I don’t know how it works in the northwestern coast, but here on the Gulf coast, you can get the Coast Guard to give your boat a safety inspection for free. They will check all your safety items, and tell you all the stuff that is required, but also give you ideas of stuff that will make it safer. My pontoon boat is on a trailer, so it was way easier. But the people doing my inspection was very helpful and suggested things that would make the boat safer on the water, but things that could and have make it more fun.

If you are going to continue boating, may I suggest taking the Coast Guard Auxiliary boating class.

I’d highly recommend installing a vacuum gauge between the fuel pump and filter as a way of monitoring filter condition. I’m not familiar with your electronic dash but you might be able to add the vacuum (fuel filter) function to the dash.

Please keep us posted on the dock situation 🙏

Lots of things here, hopefully this will help y'all out as I've read so many incorrect comments. 1. The most efficient speed is hull speed, which is a calculation and the formula is 1.34*sqrt(waterline length). That will give you your speed in knots. 2. Plowing at probably 8-10 knots like what you were doing is probably the worst. Just over the hump and on plane is the next best thing aside from hull speed. 3. Buy a Duplex RACOR filter setup for each engine. That black mess on the filter is likely algae on the tank walls from the diesel. 4. Check out "Flo-Scan" for fuel consumption measurements.

@16:48 oscar pondering how many lsx engines it takes to run one of those cargo ships 😂

If you wanna be fuel efficient with that hull keep it around 7-8kts if not planing...you're just plowing at 10-11, and anything under 17-18

The guy in your berth has probably been in your spot for awhile.

I’ll be honest, when you first started posting about this project I wasn’t a huge fan of it. But it’s become one of my favorite build series you guys have done 🛥️

The gas bill would make me feint and drown in the water 😂. Glad you're enjoying the boat...it bas been a long time coming and tons of work. Thanks Chris, Oscar and the rest of the team for making these vids possible. I really enjoy them.

So glad the boat is running and back home! Mega proud of you guys and love the boat content🎉 it was SO DARK though I was so nervous watching😂

I am sure you will have a lot of problems with that diesel sludge.That gas is slowly breaking it down.

you need to install RACOR fuel filters and should work best believe me any marine store will have them

Gotta get some bigger air cleaners on those things. Watch the video by the guys at engine masters/westech about air cleaner restriction.

Good job getting it home safely. A Faruno radar should be in the list, along with a channel 16 constant monitor as a redundant radio.

bro you need someone who actually has driven a few boats to hop in there and show you how its done, you gotta get on plane or your wasting tons of gas, marine motors are built to a higher standard than car motors theyre made to stay at decently high, steady rpm for a long time

Congratulations on the re-engining and successful return to home port! Every Christmas / New Years our family heads from Portland to the Oregon coast and we have checked in on the yacht while it was in the Astoria dry dock for the last 3 trips. Thanks for the project perseverence! You and the team are an inspiration and encouragement! 🙂

Two options for speed……hull speed, look behind you, if there’s a hole or a lot of wash you’re too fast, or planing, again not too much wash, and as slow as you can keep the hull out of the water, those will typically be the most efficient.

Great video!! Any time I run around in conditions like that. I usually climb over and try pushing slowly towards deap water. Get everybody off who can push her into deeper water and climb back on.. It works most of the time.

The filter problem isn’t the tank, it is the fuel line breaking down internally.

In the future you should get charts for the waters you wish to navigate, it seems everyone learns the same way by getting caught on a sand bar.

I'm really enjoying the change of pace with the B is for Boat series

Great to see it back it back in the water and making the trip home well. Look fwd to seeing what you guys do to it next and seeing you out there enjoying it! Also looking fwd to knowing it’s too speed once you’ve got it humming 😁👍🏼

Glad you made it back home! I am so bummed that you drove it 130 miles and didn't do a top speed run! Also I'm in the "should have ran it on plane" boat but I'm definitely not sure where your best mpg is.

I hate water and normally have 0 interest in boats. That being said, your boat content is some of my favourite that you do. Glad to see her out doing boat things. You should look into buying an enclosed life boat. I think a lot of us would enjoy watching you convert it to a little house boat.

Awesome work! Please keep sharing more boat contents!

Hi Chris, your boat has a planning hull, when she is running as a displacement vessel (i.e. not planning) the engines are going to be working hard. When you get her upon the plane you should find that you are able to back off the throttle, whilst maintaining being on the plane, which will be the most efficient way of running.

should consider having fuel tanks flushed and clean fuel remote services provide this

you MUST HAVE TANKS FLUSHED all kinds of crud is in there

Can I get an Amen on pulling the fenders? Well done!

Awesome as always.Thanks for sharing and taking us along

I gallon a minute at 60 mph translates to 1 gallon per mile... which is your same fuel consumption you're estimating at 11 mph. Right? I'm fairly certain boats are more efficient when on plane, less friction because less of the boat is in the water, but I'm not a yacht guy.

Least of worries but id ask dude with boat how long hes been there n if was aloud... if you paid for that spot you have a pretty good case to get some funds back lol

Great video. Thanks for taking us along.

Hey Chris, a tip for the flies, this comes from personal experience : I run a fan towards my bed while I sleep & that stopped the mosquitoes from biting me. Maybe having little clip fans around the engine area will help the flies?!!

I am not a boater, but am curious if it would be worth having two filters per engine so you can turn a valve to go to the secondary filter, allowing you to clean out the primary while still moving?

10:43 Seems like you have some sort of exhaust leak, or steam leak from the exhaust. It might be the water cooled exhaust manifold is not getting cooled enough. This could be quickly checked with a thermal camera.

I'm keen to see more boat content, as a fellow boat owner. I've been very lucky not to run-aground - the bay around where I live is quite shallow. I always stick to the shipping channels.

Lets go dude. So glad to see you are back at home. Also 100% feel your frustration about the blocked parking. I would not even be surprised if the marina charged that other guy for the spot after they noticed you did not come back for over a year.

Is there something dead in the boat? The amount of flies is alarming

Navionics and an Ipad will pay dividends!

Nice work! Thats a crazy adventure, what a cool place to cruse.

This was an amazing video! So happy for you and your crew! Well deserved trip home!