In today's Pump My Ride: Stu talks about the off's and on's to an alarming level of confusion. Thanks Stu! And we are all pumped for your next video.

Excellent explanation and video. I have seen a number of engineering teachers fail to properly explain this.

Simple little pumps. I quite enjoy these short educational videos.

Love your videos; really enjoy the short conversations with your chickens at the end.

I saw a member D Squad crashing the party before their slot at the end. The vids are a good morale booster, thanks!

3 vids in a week, thanks Stu!

Thanks Stu more videos for the self isolating at home

Thank you Stu! My old Navy boat has a DD 4-53 and now, through your tutelage, I have changed the raw water impeller; rebuilt the blower assembly, changed the rocker cover and gasket, and am beginning to re wire.

Thanks Stu from the UK. Helping us stay sane during lockdown. Keep it up mate. Cheers.

I was just cruising around the site when I caught a glimpse of a very nice looking Blue boat and after looking at it for a few moments it hit that this impressive looking boat was your boat. She sure is a pretty boat, you have done some miracles with it.

Thanks for the extra posts Stu. It not only helps relieve the boredom, but also teaches me useful stuff. Very easy to understand explanation too, as usual.

This video has navigated right into my heart.

Thanks Stu. I appreciate that you don't just show us you repairing things but explaining how they work. Your video on Wet Exhaust Vs. Dry Exhaust was great. Sorry I could not find a pithy remark to include in this comment incorporating any Nulon products.

Thanks for a nice Technical demonstration. Might help less mechanical boat owners understand the importance of not dry starting/running a motor. Keep up the great videos.

im not actually a boat guy so never knew how they worked.. learnt something today :) 👍🍻

I just replaced the impellers in 3 jabsco pumps for a ballast system yesterday never new how they worked thanks

Thanks for churning out the regular content mate, sure makes the necessary isolation bearable.

Really appreciate the more regularly videos during lockdown down. (From NZ)

Great job of teaching how these pumps work. CHEERS

Keep up the dedication mate, your content is great. Thanks for the no BS videos.

Thanks for the video and explanation - Press On and Stay Safe!

Good concise video Stu, there are two specifications of material for the impellers, one of which tolerates oil and diesel.

Thanks so much Stu,what a very clear,concise and intersting explanation. Stay safe and take care buddy

Thank you STU for uploading these videos faster then normal. Sitting around the house is driving me crazy. Makes us feel like were out there with you as you are doing these projects. Take care..

really interesting to go back to when you first bought the boat and how the plan has evolved..

I Learn something new every time I watch your channel, Thanks Stu. 👍

As a distributor of Jabsco pumps, I can only recommend this! Well done!

looking forward to your first cruise.

Absolutely brilliant explanations mate. Gee you're a joy to watch. Thank you

Thanks Stu for keeping us all from feeling like we're ready for the Nuthouse. Be safe and take care or we'll never see a finished project.

Good job explaining how those pumps work.

Stu, I am in lockdown like many others at home in nz( and very lucky to be safe/health etc ) . Thanks for posting this week, I really enjoy seeing the progress! Adam

Great video Stu. Perfect timing as I'm in the middle of refurbishing mine. Thanks.

Awesome as usual .

wow stu! your videos are a lifeline here in lockdown. seems like they are more frequent too. thank you!

Really good explanation. Learned something today 👍

Best explanation of this I've seen.

Thanks for posting additional vids at the moment Stu.

Hey really really good explanation thank you. Nice short format would love more short explanation videos like this.

When you rebuild those, be careful with the "bronze wedge" that the impellor presses agaisnt. They are "handed" and if you put them in the wrong way round, they will eat up the impellor in no time.

Quality content Stu. Cant wait for the vids of the boat in action

Thank you for your tutorial.

Great video as always!

Good stuff Stu. Stay safe.

Thanks Stu.

Great explanation

No I'm glad you explained the pump I thought that it was a different type John

Thanks Stu for going over the Jabsco basics, I just wanted to add that often your Jabsco is located low on the engine near the water line and should have a P trap arrangement like a home plumbing fixture in order to trap some water in it to prevent dry starts. Keep sailing, no submarines.

Stu, great explanation on the working of a flexible impeller pump. Outboard pumps, while also being flexible impeller pumps, act as both a displacement pump and a circulating or centrifugal pump. At low to moderate speeds the pump works just as you described for the flexible impeller pump. At high speeds, the resistance of the water in the pump causes the blades to move inward and away from the inside surface of the pump. At that point, it becomes a circulating pump. The forward motion of the lower unit through the water provides the impetus needed to prime the 'centrifugal' pump.

Thanks Stu!

I learned a lot from this one.

For those that don't know.....Now you do.....Simple huuu...Thanks Dangar...!

Thanks Stu. Stay safe and see you next week... ;-}

Thanks for posting Stu. Haven’t been out of the house for 6 days because of lockdown so it’s nice to see the videos. Going fishing Mon-Wed Channel Islands CA to get out of the house but I love the videos man. You do a great job.

Great explanation!

Thanks Bud wondered how that worked.

Ok, this is a tad complicated but hopefully Stu will read and understand. When cruising the Pacific Northwest sea grass or other flotsam fairly often plugs the raw water inlet. A friend I met decided waiting for the temperature alarm to indicate a problem wasn't ideal. So, like Stu, he installed a flow meter. But, being an electrical engineer, he took the flow sensor and added the signal to the rpm of the engine and sounded an alarm when flow vs rpm was too low. When this happened he would put a hand air pump on a T fitting from the hose out of the raw water inlet and pump air back through the inlet to clear the obstruction. He thought that was less damaging than my wire coat hanger solution and didn't require pulling off the hose. Anyway, love the videos. Let me know if you want to help my friend market his invention...🙂

Hi there Stu you should not use galvanized pipe fittings for seawater it will work like zinc anode all the best from Denmark

Watching from Auckland

Jabsco water impeller pumps are great. It will be fantastic when someone can invent a heat resistant impeller, like that ovenproof latex bakeware? Stu......., Read on! We have a 26 foot wooden clinker 2 cylinder Lister Petter 25Hp diesel with a Jabsco impeller for both engine, bilge or pressuring a seawater hose by manually diverting the water. Stu, with ours, if it ran dry or with the sea cock closed, it overheats & can easily perish. Had the boat for more than 45yrs now (dad bought it when I was 12) and mum basically kept it in the family after my dad died 1 yr into owning the "Lokalee". I was always on it from a young age, it was our 2nd boat. The first was a 22 foot Diesel 1 cylinder clinker build boat with no electrics. We had old brass kerosene Port & Starboard lamps & a small kerosene riding light. Been past Dangar Island many times Stu! (Never been ashore there). Our boat is down in Middle Harbour, my brother works at Northbridge Marina. His friend is a friend of yours he calls "a bloody mad spearfisherman". Ring any bells? I have loved your series on "Renko". From your outboard videos I have fixed & sold 3 "council clean up" lawn mowers, two were 2 stroke, the other a 4 stroke. I used to have both chickens & ducks, until the stupid council told me no more! (Meaning no longer). Some obscure ordinance. It is still a pain buying eggs, my girls eggs were so much richer and I love the taste of duck eggs!

Awesome video! Thanks!

Great explanation, thank you

nicely done

had a pump like this on my 1960 volvo penta bb70. I would put mineral oil in the pump for dry storage to keep the rubber happy. had it 10 years no trouble.

Good tips mate, Thanks..really enjoying the extra effort you are posting this week..Trying times are made much better by your extra new uploads..Keep an eye on those chooks though mate they could be a much desired item soon for their free eggs and at a pinch they mould make nice soft toot paper alternatives. Stay safe mate

Hi Stu, your Jabsco pump setup looks OK. Another setup; plumb the pump at the bottom of an "S" bend that traps a volume of water to keep the impellor wet at all times. This setup is good for boats that are regularly taken out of the water. Also wipe the impeller all over with silicon rubber grease "Molykote valve & "O"ring grease " this is a rubber conditioner and will extend the life of the impellor by a factor of many. I hope this helps. Cheers

Good health mate.

That pump you have is set up for a sea water deck wash hose reason for the clutch on it. Jabsco pumps can handle dirty water better than a centrifugal pump.

hi very useful information.

Off-On ... On-Off ... Off-On oh well, it does one or the other or maybe both. Love it.

Those neoprene impellers seem to wear fairly quickly or simply fly to pieces and jam up the works. I now see how much stress and load they are under. Thank you for the explanation Stu, good video mate. I hope you and yours are doing well during this pandemic.

Cool Mate!

Aawwww Stu did you put warm water in the sink to save your wee hands? I notice you turned off the Hot And Cold taps @ 6.34. Legend! Loved the explanation of the Jabsco pump.

Alarm goes on, alarm goes off. This sounds like something from a Monty Python skit.

Hey Stu, thanks for the extra content this week, it's very much appreciated! Couple episodes back you had on a D-Squad shirt......when they gonna be in the shop mate???

Wow I had no idea impellers like that were used in anything but outboards. Thank you for sharing that knowledge

Thank you

not on todays subject but did you ever think of tying the correct size bungs to the raw water inlets for emergency access

Enjoyed

Just a side note, rubber doesn't handle mineral oil based lubricants well. Neoprene does, and is common in oil seals and O rings. Silicone based elastomers are becoming common in applications that require good flexibility over wide temperature ranges. Many of them do NOT play nice with silicone lubricants.

Good stuff Stu. If you run out of ideas for vids soon, even just chucking a line in would be good. cheers.

...GOOD ONE, KEEP SAFE...

That was a great video! This is the type of content that brought me to your channel way back. Now every time I learn something, I feel like I should at least buy a T-shirt... So, I think I’ll do that today. Any bet on how long it will take to get to Kingston, Ontario, Canada? Be well Stu and thanks for the extra content.

@Dangar Marine - Stu - To be fair, I eagerly watched and looked forward to your continuing boat rehab videos, since being introduced to you, on Bus Grease Monkey's channel - prior to this curse of the _replicators_ (SG-1 reference) and; not unlike everyone else now, thank you for still busying yourself and showing it, that we may collectively remain, somewhat sane - or at least enough distracted. Until or, unless you're better paid - may we all live through this well enough to continue to advise and nit-pick, your process. Living in this nation (USA) that's so-far, taken over the lead on #COVIDIOCY - while, you've just gone from fire to viri - interesting times, indeed. Though, I've likely met or slightly exceeded my daily allotment for beer consumption; spirit is still true, many thanks to you! And, blast for making me think about liking chickens - beyond egg production and main-stays of dinner plates (care for a few roosters?). My very best regards, cheers-

Could add an extra layer of security by putting a check valve on the outlet. You could also put one on the inlet so even if you need to fiddle with the pipework you would still be mostly primed.

Thx Stu

REALLY good explaination. I wonder if plastics are far enough along so you could replace that steal cover with a plastic one. Video idea, maybe?

That’s why I cringe every time someone starts an outboard out of water ! They don’t realize the damage that could cause to the impeller !

Stu you may have discussed what size bilge pump to use, but do you take into consideration the volume of water that can be supplied by the largest seacock on the boat in determining bilge pump size? Also would it be beneficial to install a Tee at the raw water strainer with valve and a hose running down into the bilge so that the Jabsco raw water pump could be used as an extra or in additional bilge pump in an emergency?

Stu, this is all very good and all, but you have a lot of work to do.

I cant imagine having a sea pump not running. It's the first thing I check. Without it my exhaust would be on fire in about 30 seconds.

Nice exploitation of a positive displacement pump.

Speaking of fail safe alarms like your raw water flow meter, are you also going to have a alarm for an oil pressure switch. Like the alarm makes noise when you have less then 5 psi? Maybe your gauge will or something. Just curious. The noise makers can be annoying but that’s why people use them.

I hope you know that your the best KZfaqr I watch I can't wait to see when you work on the mid cabin it will be exciting to see the dangermarine touch

Stu Is that the breather I see painted on the bench ? Good description of how a rubber bladed pump works. Some people can't understand not to run the outboard with no water muffs.🤔

Mate put a perspex cover on the back of the Pump and you can do a visual :)

Hey Stu. Hope you are staying healthy and safe where you are. I just watched the latest " SV Seeker " video. Doug was making a cradle for his small aluminium dinghy to go on top of the main hatch. Not to be confused with his awesome ship tender. He mentioned he was planning to mount a 15 Horsepower Outboard engine to his Dinghy. I think after the travel ban you and a few mates may have to travel to the US to do an intervention on Doug. I told Doug in a comment..... You guys are putting a 15 HP Outboard on that Dinghy? To quote James Doohan and Tim Allen. " She needs MORE powerrrr !!!!! " Dangar Stu craps outboards with more horsepower.

The language we always used is "the alarm sounds" or " it is quiet"

You are certainly doing your bit too keep us occupied while in look down. #notallheroswearacape

should carry a couple a plunger heads in case one of the skin fittings failed/busted off or something, be a nice quick way of jumping under there and quickly blocking it while you sort out something better