Evinrude 40 HP Outboard; Powerhead Autopsy

[@CL-ok1gx]

Thanks man!! completely rebuilt my 1988 88hp Johnson all new shafts, bearings, gears and seals watching and studying your videos. Love the old vhs carb tuning videos.

[@Reeser00]

I really like your videos! I’m feeling pretty confident to delete my vro, change my impeller, adjust my timing, and clean my carbs! Thank you

[@Reeser00]

I do you have one question. if the previous owner had the timing way out of whack. I feel like I couldn’t hurt anything to put it back to the correct parameters? Because I know I’m not gonna get a test prop. Your thoughts?

[@fabiodenardi904]

Video molto interessante!! Grazie. Saluti dall'Italia.

[@charlesronk2989]

Mine looked like that. A little honing and it was fine. All of the screws came out that hold the reeds in. Light scratches in the cylinder walls. The top of #2 piston and head was damaged. The bearings in #2 cylinder were gone.

[@volunteermaupi4809]

VRO baby! its not a matter if its going to happen....but when its gonna happen. i am an absolute Johnson fan, i have more then a few, but VRO is top cilinder killer if you have an VRO fitted outboard, take it of and mix ur own fuel.

[@alisajoyce8922]

I have an 86 and I have been reading about the vro being a problem, but then found a technical site that says its almost never an issue. Which is it? Very interesting.

[@daddski1]

@@alisajoyce8922 52 years as a marine mechanic and repair shop owner / operator. Thousands 9literally) of rebuilds on vro engines, every single one from a failed vro. Don't believe for one moment anyone that says they never cause issues. You just saw this video. VRO did this

[@rickh5671]

Brandon I have a 1996 40 horse Evinrude two stroke outboard on a 96 pontoon aqua patio it stopped running started out check for spark it had spark check to get gas it’s getting gas won’t start tried a little bit ether still wont start check the plugs they got spark unfortunately doesn’t feel like there any suction on the intake when I had together the reads are good got the head off ,cylinders are good got the pistons out had 130 pounds of pressure both cylinders been looking at all your post I am baffled do you think there’s anyway I can have some type of plugged exhaust I’ve tried to put the piston on bottom dead center and blowing air through the cylinders can’t seem to fill no exhaust air coming out by the prop I still have the Pistons out reads out and obviously the head off don’t know what else to check before I put it back together for some reason I think something is plugged in the exhaust on another note I got it out Memorial Day weekend and drove it across the lake and it stalled wouldn’t start any advice would be helpful thanks so much and thanks for all your post

[@King-Frosch.]

Therefore, you must mix oil and gasoline yourself. I hope there will be more videos of this engine :-) side plate of block ?? Hilsen Poul From Denmark

[@icast.2388]

Ekselent job Just a question can I put powerhead from short shaft to the low shaft. 1989 40hp evinrude Thanks

[@BrandonsGarage]

Yes, same powerhead.

[@icast.2388]

@@BrandonsGarage Thanky you so much...

[@aaronjewell8123]

I have a 1984 Evanrude Super40. I believe it is identical to the 84 Norsemen. Sold to another part of the world and name something different. Is it possible to take a electric start system from a 84 Evan rude and adapted over to the 84 super40. My problem is that you damn near have to be the Incredible Hulk to pull start this motor and if you're not paying attention it will pull you right back into it. So I'm hope is that I can take the electric start setup off of the 84 Evinrude 40 and it will fit onto the 1984 Evan rude super 40. Thankyou. 🙏🙏

[@benjamincosey2793]

Love all the videos. Any tips to remove the original tstst plug if the head is snapped off. Mine does not seem to have the second set of flat faces? Thanks for any help I have already learned so much from your video and I only got my motor 3 days ago.

[@Frank-dz8jt]

Thank you for the video it's exactly what I was looking for. it dawned on me why I lost crankcase pressure for the fuel pump, can you tell me if there is a seal at the bottom of that crank?

[@scottd3532]

Hi Brandon would you sell me the plastic fuse box cover,,mine was missing when I bought the motor

[@AaronJohnson-td2ds]

My 91 Johnson 50 two cylinder is running 105PSI in both cylinders. It looks like other Johnson 2 stroke 50s from the 1980s to 2000s are running as high as 140-150psi. In the past I’ve increased compression of 2 stroke small engines by replacing rings only, but I’ve never worked on a larger engine. Do I have reasonable chances of increasing compression if I do rings only and don’t hone the head or replace pistons?

[@brandonandsons2353]

Nice video very informational

[@dustin9035]

New set of rings and SHIP IT!

[@billyrayband]

Helpful teardown...but the bearing failure was not the cause of the failure...what do you think caused the bearing failure? hours? VRO (you did not inspect it)? I just got an 88 40 HP Evinrude and I am removing VRO, to replace with just fuel pump and use premix.

[@teamdougherty]

Why would you think this was a VRO failure? A VRO failure would not just affect one bearing.

[@wg7644]

@@teamdougherty Could it be a the VRO pump failure something obstructed the mix getting to the top cylinder meanwhile the bottom cylinder kept moving along until the top cylinder lost all lubrication?

[@teamdougherty]

@@wg7644 The VRO takes oil from the oil tank and fuel from the fuel tank using separate feed lines and separate parts of the pump. Once passed the pump the fuel and oil mixture the pass through the carburetor(s) then the engine crank case to lubricate the bearings and the bottom on the cylinder walls. After that it is routed to the combustion chamber to lubricate the top of the cylinder then ignited to provide power. If the VRO failed it would affect the whole engine at the same time. Maybe if a carb failed and didn't provide fuel to the cylinder behind it that bearing would fail. But a VRO failure cannot affect one cylinder.

[@daddski1]

@@teamdougherty with respect friend, this .is a classic example. Yes it is possible all cylinders die at the same time but more than half of the roughly 9000 engines my shops have rebuilt from vro failures look exactly like this.

[@armusc757]

All that crystalization on top piston = water in the head, possible origin, bad head gasket?

[@daddski1]

its not crystalzation friend, its chunks of bearings and aluminum from piston

[@adammcintyre3826]

I’m working on a E40hp. Took a drift and hammer to get the wrist pins out. And same to get back in (on my practice piston from donor motor). I’ve seen some piston assembly but not on the 40. Do these wrist pins need to be pressed in/out or should they just slide into place? I don’t know if you got that deep in a rebuild or not.

[@BrandonsGarage]

They have a piston cradle, and a pressing pin to press them in. With that said, Ive seen them so tight a hammer is required, other times you can push them out with your finger.

[@williambobo7492]

I'm looking for this powerhead gasket. Can't seem to find it. Any suggestions?

[@goldenarrow49]

Do I need to pull the power head to replace the upper motor mount? I’m working on a 89 50hp that is having shifting issues due to worn out motor mounts.

[@antfarmmining7824]

That motor ate those screws that are missing out of the silencer housing, when the piston smashed the screws into the head it cracked the piston skirt and the chunks got in the bearings and ate them up .

[@daddski1]

vro killed this engine friend. That is why the crnk /rod bearings are melted and fused. The heat from this happening is why the upper is discollored. No way that crank is any good, nor the rod. In my now 52 years of marine engine repair my shops have rebuilt thousands of vro and oil injection engines. Every one of them look just like this one on at least one cyl. Also friend your scenario would have the lower cyl killed in a much different way

[@rjtucker1965a]

Need To Know About Bottom crank Barrings Removal

[@BrandonsGarage]

Powerhead already removed and disassembled?

[@timbarnett3898]

How similar this 40hp compared to me 48? Looks similar from first glance!

[@BrandonsGarage]

identical. Would need a micrometer to tell the difference.

[@timbarnett3898]

@@BrandonsGarage thanks for info! You've helped me a lot with the breakdown an seized piston (amazing barrel wasn't damaged more-I would think I'd use that head again) I watched your timing VCR video an found a problem with our motors there to: timing requires special "Timing Prop" which are Not available (like you say, no one wants to sale their needed timing tool) So we need a duplicate to replace the impossible to find time prop! My timing light is an "Advancing" light with a dial to check timing advancing working, maybe this can help me!?

[@raymondsimpson7433]

Is there a gasket that goes between the 2 crank case halves?

[@bobbell5928]

No gasket.

[@angelgutierrez9858]

Where do you live Brandon, i have a motor Johnson that i need work on

[@BrandonsGarage]

California, headed to Arizona soon though.

[@angelgutierrez9858]

You got a phone #

[@Berry-McCaulkiner]

@@BrandonsGarage Did you make it to AZ?

[@Nudnik1]

These twins swallowed reed valves alot in the 1970-80 years. Not enough oil in gas . Typical failure You can't use that rod or crank....

[@costafortia]

Trying to subscribe but KZbin doesn’t let me. Keep seeing your videos and re-subscribing. :/

[@BrandonsGarage]

weird

[@TimeSlipVoyager]

Hey where you located ?

[@BrandonsGarage]

Arizona now. You?

[@TimeSlipVoyager]

@@BrandonsGarage darn florida

[@TimeSlipVoyager]

Got a j50telcob