1986 Mercruiser 170 HP engine rebuild
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- čas přidán 5. 09. 2024
- Minnesota Vikings painted and rebuilt engine. From start to finish how to video for what was done during rebuild. 1986 Mercruiser 470 with 170 HP 224 cubic inch 3.7 L. Completely rebuilt after rust and neglect consumed it for several years. Motor came out of a 1986 Celebrity Calais 18' ski boat. Watch until the end for the test start and run!
You worked hard and did a wonderful job ,it looks beautiful ,very good work ,enjoy the fruit of your labour
Thank you!! Can't wait to get it finished and on the water
Great job you inspire me to do the same. Sincerely medically retired with less then a few years left. I guest my family will enjoy my boat when I'm gone. Boat name is "Kidney failure". wish me luck that I'm able to start and finish the project.
Good luck and take care. Prayers that you find comfort and healing.
I've watched your video 2 or 3 times now. I'm halfway thru overhauling my 470 for the second time. First time was 20 years ago. Great little motors.
Glad you liked the video. Sorry I missed this comment before. Hope it turned out great for you!!
Jason, What a labor of love, looks great sound AWESOME!
Thanks buddy!! Maybe you'll get up this way sometime and I will take you out for a ride.
I rebuilt my 470 just before COVID lockdowns started. Found your video today, haha. It would have been nice to see your vid before doing my rebuild, but it looks like we took a lot of the same steps. I went with Ford Red for all covers and the harmonic balancer and flat black for the block and head.
That sounds awesome!! Hope it runs great for you!
Awesome. May have to overhaul my 170 in the future. It's running great right now but weeping coolant in the front, indicating that the front seal/camshaft job needs to be done before I end up with a 2nd seal failure and major troubles. Did a leakdown test for kicks and all is good for now, and I'd like to keep it that way! 86 Sea Ray Seville II ski boat in pristine condition for its age. Thanks for the video!
Good luck! Sorry for the late reply, missed this comment for some reason. Hope it turned out great👍
@Jason Gansen did cam job as well as head gasket and had a machine shop go through the head, she's running great now!
That's fantastic! Thanks for the update!
It’s impressive what a bit of effort and skil can make of something
Thank you!!
What I like about what you done here was your attention to detail, it’s what makes it stand out against other rebuilds
Very Nice Job, that's impressive!
Glad you did this video as I forgot where the exhaust studs were located
Found the location at 1:26👍
Awesome! Good luck!
Really nice job!
Thank you! Still working on the boat to have something to put it in, but I'm getting closer!
Amazing rebuild man, just got a 1984 aqua craft with a 488 MerCruiser, and thinking to tackle the rebuild project. Any idea Roughly How many hours it took you to rebuild the engine and the rough cost you including the professional cleaning and services?
I think the head and valves were around $200. It was 5 years ago, but it seems like it was 300 hours and $1,000 to $1,500 approximately. Good luck!!
Great video. I love this engine! What could be better than something that accepts a BBF head and has a Chevy "barn" shaped bellhousing? The only thing more fun would be putting a Boss 429 cylinder head on it.
It is a pretty sweet engine. Can't wait to get it on the water
Nice vid bro and LSU colors
Nice Job!!!! You want to come do my Mercruiser 140HP Engine lol, It runs GREAT, just want it painted and worked over, But really very NICE job...
Thank you! Sorry, this is a one of a kind.
@@locallybuilt oh i know was j/k, might paint mine one day. lol
Just bought a 95 Glastron with a 3.0 Mercruiser i need to rebuild. Going to have to follow in your foot steps
Good luck! Post here if you have a question and I will see if I can offer any help.
Jason Gansen was thanks sir
I have the same engine in my 1985 Sea Sprite, and the camshaft seals have begun leaking, letting oil and coolant intermingle... this rebuild is in my future. Thanks for the video. I might hit you up for some tips, if you're willing to offer advice... I've rebuilt one engine before- in my beat up Toyota pickup... so I have at least some experience in what goes into a rebuild. I've read that the block (aluminum) and the head (being iron) often end up with marriage problems... I'll probably take the block and head into a machine shop to have them planed down to ensure they're flush. Anyways.... my boat is in need of new vinyl and floor decking too... I hope I get it done this year so I can at least use it next year!
Doing research I was under the impression the camshaft seals were leaking... but I don't see any camshaft in your rebuild... is there a cam, and are there end-seals?
@@willowswamp9896 there is a cam shaft. It was the only thing I didn't touch or need to fix. I don't think a cam seal is your problem but hard to say without looking. It's usually a cracked head or head gasket to cause that. I will definitely try to help if you have questions. Just post your questions here.
Great work!
Smart man
The newer upgraded starter is smaller and lighter. It's much easier to install, too. I thought you were going to change the sleeves.
I probably should have replaced the sleeves. The boring worked really well except for one, which was gouged a little too deep, but seems to run really, really well. I guess I will find out pretty fast of it needs to be replaced. Thanks for the comment!!
Looks like you did a pretty fair job. Didn't see much about crank & bearings. Lot of work. Boat did not look worth it though.
The crankshaft and bearings actually looked pretty good. I have done a TON of work since this video. Completely gutted boat, 100% new wood all around. 100% new vinyl, new everything. I wouldn't have done this project knowing what I do now. Once I got in it, spent all that money, found something else rotted, had to keep going because of time and money already spent. It's been a love/hate relationship. But I will basically have a brand new boat when done though. Thanks for the comment!
Hi ya great job bud ... starting a very similar rebuild on mine ,unfortunately living in Ireland parts are very hard to access 🥺 I have the same issue with my starter solenoid is damaged what Ford did you match your too ... all advice welcome regarding head gasket and water pump gasket kit , seals , pumps , gaskets , 👍
I don't remember which solenoid I got. I think I showed the guys at NAPA auto parts and they got me a compatible one. I used this sight www.crowleymarine.com/mercury-outboard/908.cfm?mdl= EBay, and Amazon for all my parts
That engine looks great, and i learned some things i want to do to my 470, not trying to be critical but im concerned about that cool as nt resevoir.. looked blown out... could be how valves got so rusted out.. mine looked the same. Raw water was going thru rot hole and in thru exhaust ports
I examined the entire engine thoroughly and fixed, rebuilt, or replaced every single part from the bottom up. So, fingers crossed, I won't have any problems with it going forward. It's still an old engine, so I guess I will find out.
Настоящий мужчина ! Отличная работа ,молодец ! Minnesota?
I had completely forgotten that Mercruiser ever sold the 470.
great job
Thank you!
Great Video Jason - Can I ask what is required to "Run In" your rebuilt 470 ??
What sort of revs for how many hrs ?? and so on.
I'm asking cause I'm having a newly re manufactured 470 installed in my Bertram 20
Cheers
Jay
I personally will idle it for 30 minutes then run variable speeds for an hour on the water. Not full throttle though until maybe a couple hours run in total. I've idled it and ran it up to half throttle a few seconds and total engine run 5 minutes at a time probably 4 or 5 times with garden hose connected so far.
My 1986 170 came with a water cooled fuel line which is now 35 years old. I wanted to replace the cooled fuel line but they are no longer in production. I saw that you have a regular metal line from the fuel pump to the carburetor. If I am using ethanol free gas do you think I need the water cooled line to prevent vapor lock?
So sorry I missed this comment. Hopefully you've figured it out in all this time. I would absolutely still use water cool. It seems I've seen some videos on how to get rid of water cooler and go to direct. It's been years since the rebuild, so can't remember. Good luck!
Hi I have a thundercraft 1986 with the same engine, you did a great job rebuilding your engine. did you timed your engine at 8 or 4'degree BTDC?
I did 8 because it was on the valve cover placard
Hi Jason, great videos! I'm currently rebuilding a Merc 3.7 and I'm ready to start it up before I get it back into the boat. Do you have a link that describes the basic setup to run the engine outside of the boat? Seems like the kind of thing I should be able to easily find but I'm coming up empty. I think I've watched this video 100 times to check my work, super informative. Thank so much!
That's awesome! I just connected a cut off garden hose to the water intake hose and ran water to the water pump. I think I saw somewhere that you are supposed to do an engine break-in at 50-75% power or less for an hour for a complete rebuild like this. Glad you found the video helpful!💪 Good luck!
The first run should probably be at around idle for 30 minutes
I disconnected some wires and don’t know how to set them back up in engine. What’s the best way to find out how to put it back together I can’t find anything and I already took it somewhere but they charging to much
Hi Jason, nice work! Any idea how many hours start to finish the rebuilt took?
300 hours
Will be good to rebuild 120horsepower or get a new motor
What was original failure caused by. Did you measure the bore. What where. The ring gaps like. I need to do mine. Gettin blow by and coolant in oil. Nice work. Well done
The engine was seized from rust sitting outside uncovered for a couple years. I did not measure the bore. Ring gaps weren't bad, replaced rings, polished pistons, and bored the sleeves just enough to get rid of the rust. Probably should have done measurements, but everything went together like it was supposed to (tight) and runs really well. So called it good. Honestly, not a lot of thought went into that part. I was lucky and it worked out.
I wonder if you have a cracked head on yours?
@@locallybuilt possibly. I guess i will start by compression and leakdown tests. Cam seals worn can also cause coolant in water. Cracked intakes etc. Thanks
Hi Jason just bought a 17' boat with one of these in it. Any tips? Resources you used? Anything helps. Thank you
Holy cow, so sorry I missed your comment!!!! Hopefully you've figured it out by now. I am still not done rebuilding after 5 years, so my recommendation in hindsight is to sell it before you have too much time and money invested 😉 hope it turned out for you!!
AWESOME
That's awesome!! What boat is this going into? Have you been on the water yet?
1986 Celebrity Calias.
Haven't been on the water yet. Have to repaint the paint, rebuilt all the wood and all new vinyl. Have a ways to go yet
any tips on installing the hoses on the upper exhaust cooling- what a PITA
I don't recall having any issues with that. What are you having trouble with specifically and maybe I could come up with something
@@locallybuilt the new hoses don't want to slip on- I used dish soap and muscle but by the time I get the bottom hose on the top is too difficult to swing around and put in place- can you make a video showing how you did it?
@@dtingue sorry, can't make a video because the engine is all done. If I recall, (it was 2 years ago), I put a tiny drop of oil on my finger and wiped it on the inside of the hose and the hose fitting. My hoses were brand new too, so that might have helped. Good luck
Great idea on the oil drain plug. What size and parts were used? Also, would you be able to tell me the parts used for the oil cooler thanks in advance.
Thanks for the comment. I honestly don't remember anymore. This build was 5 years ago. The majority of everything I did was found on the internet, just need to do some digging. There are a lot of part diagrams out there. Good luck. If I find my notes, I post them here.
Wow dude!! That is AWESOME. I just brought home an '88 470 that hasn't run in 16 years. Any good lessons learned from your project?
If you can, search online how to convert the cooling system and get rid of heat exchanger. The head should be stamped "ford" on yours too. So if you need any parts specifically for the head, you can use Ford 460 parts if memory serves. Replace all gaskets and seals. They are probably all bad. Make sure you have all the torque specs and follow them. Especially the side cover bolts. The side cover cracks really easy. If the stator needs to be replaced, it might be cheaper and easier to find if you convert it to an alternator. There are several videos and info online how to do this. Good luck!
@@locallybuilt You rock! Thank you sir!
@@locallybuilt It's been three years. Hopefully you're back on the water? ;) Running like a champ, I'll bet!
@@twistedsphere I had to gut the boat and rebuild every piece. Transom, seats, panels, dash, stringers, floor... Everything. Then had some health issues that are ongoing. Everything is built and almost done. Just need to paint the boat and install everything. Long, LONG, project but almost done.
@@locallybuilt Agree with all of the above except getting rid of heat exchanger. The block on the 170 is aluminum, and the head is iron from a Ford 460 as I'm sure you know. The dissimilar metals cause severe corrosion if a PH balanced 50/50 antifreeze mixture is not used to cool the engine. Circulating lake (or especially salt) water through the block is not a good idea on this motor. The 4" heat exchanger is ample to cool this motor as long as the thermostat and impeller are working properly. I would caution everyone very strongly AGAINST removing the heat exchanger. Plus, getting rid of it makes winterizing much more difficult.
@Jason What is the part called with the yellow cap? I need a new one cause it’s causing the water to be red cause of rust.
www.perfprotech.com/mercury-marine-parts-catalog/exhaust-manifold-and-exhaust-elbowaluminum/assembly/908/100?model=1270
CAP, Pressure - FILLER (#36-13130)
Hope that helps!!
How many quarts of oil does this engine carry? Thank you
5 1/2 US qts
@@locallybuilt thank you very much Jason.
Hi from Australia. Love your vid on rebuild. I have just bought a 485 mercruiser and find parts really hard/ impossible to get here in Australia. Can you put me onto any places in US that have parts for these motors? It seems all the 400 -488 series motors use the same parts through the 80,s. Anyway, thanks again for the vid. Cheers Dave.
Try this. Good luck.
www.perfprotech.com/mercury-marine-parts-catalog/crankshaft-flywheel-and-alternator/assembly/908/150?model=1270
Or this...
www.marineengine.com/parts/mercury-outboard/index.php
Did you use the oil pump alignment tool?
I did not.
I bought a boat with sane angel how much do you cost to rebuild it
How much more HP did it make with paint and polish rebuild?
I never checked
You are awesome 💪💪💪👍👍👍 Do you have a list for parts?
Here is what I used for a parts list
www.crowleymarine.com/mercury-outboard/908.cfm?mdl=8LJOIR
Also, thanks for the comment! I appreciate it!
is the engine a closed cooling system?
Its so hard to find information on these engines because most people dont want to put in the time. I wish you had more content but I'm satisfied with what you did show. Thanks so much, what was the total cost?? Ive got this rebuild in my near future.
I have maybe less than $1,000 I think with the complete engine rebuild. I found NAPA parts store was able to get the majority of the parts for me. Otherwise, eBay for parts. There were a few things I found on Amazon too.
@@locallybuilt thanks for the prompt response and extra information! Any updates on putting it back into the boat?
Long ways to go yet before it gets in the boat. Every piece of wood has been rebuilt. Vinyl is done but have to put it on new wood. Fiberglass repairs to hull. Repaint boat and trailer. New boat floor. Then should be ready for motor. Bigger project than anticipated.
@@locallybuilt good luck! It'll be worth it when it shines like a new penny!
Do you have a part # on that starter? I need the same one
Try this: www.crowleymarine.com/mercury-outboard/parts/908_10.cfm?mdl=8LJOIR
I rebuilt mine also but I can’t get no spark 😥😥
Where you able to get spark?
Should have pulled and inspected crank and change main bearings
I did. Just didn't get that in the video. Thanks for the comment. Great suggestion 👍
great job, but I didn't see anything about the water pump
I had to replace all the seals on the water pump. The pump itself was in great condition. I had to buy a seal and bearing press kit at Harbor freight to get them out and the new ones in. Unfortunately, I didn't get a single picture of that process. Don't know why I didn't think of pictures or a video. Probably too focused on the project at the time. They were not fun to replace. Thanks for the comment and reminder that I did do that!
Hi this is amazing i was giving a 22' Chris craft scorpion 211 with this same engine i cant find any mechanic that will help me. Is there a step by step Manual for how to do this? Also may i contact you to show you pics of mines?
I wasn't able to find a manual, but with enough digging on google, I was able to piece enough information together to figure it out. I used Crowley marine a lot:
www.crowleymarine.com/mercury-outboard/908.cfm
And here:
www.perfprotech.com/mercury-marine-parts-catalog/model/04/320/170%20%282%20BBL.%29%20%20MERCURY%20224%20I%2FL4%20%201985-1986/6916779-thru-0b434940
Transom service kits:
www.boatpartheadquarters.com/Transom-Service-Kits-s/2064.htm
Remote control for throttle:
www.marineengine.com/parts/mercury-marine-accessory-parts/remote-controls-and-components/1986-thru-1993/modular-components
I found a shop manual online. Around $30
www.repairmanual.com/product/clymer-mercruiser-1964-1987-stern-drive-boat-engine-repair-manual/
How much to rebuild the motor
I honestly don't remember. That was 4 years ago. Less than $1,000 for all the replacement parts.
I'm trying to find rotation direction on this engine.. Do you remember what it is by chance or have a way of checking? Thanks in advance
Sorry I missed your comment. Engine rotation was listed on my valve cover placard as counter clockwise.
This engine is basically half of a big block Chevy 454, am I right?
It's a 460 Ford engine one half
@@locallybuilt They use Ford 460 con rods, pistons and one cylinder head. They are are shorter stroke then the 460 totaling 224 cubic inches. Good Luck.
Engine fluid on the floor is a part in being a mechanic. 😂
Sure seems to be, doesn't it 🤣🤣 if you and your surroundings aren't filthy, ya ain't working hard enough, right?😜
True, True😂
All that work and nothing to put it in
Hi Jason, great job on your rebuild! I have the same engine that I just rebuilt too. I'm having trouble with it backfiring when I hit the throttle fast. I figured it was either the carb or timing, but the carb has been rebuilt and the timing is dead on 8 degrees before TDC. I converted to electronic ignition in hopes it would cure it, but no luck (although it definitely runs smoother.) If i ease into the throttle there's no backfiring. It did the same thing before the rebuild, too. Did you have this issue with yours? Or do you have any suggestions?
Here's what the rebuild entailed: Bored .30 over, decked .005, crank turned .10 under, new pistons, rings, valves, springs, lifters, push rods, bearings, oil pump, plugs, wires, dist cap.
Here's my engine: czcams.com/video/-owBQlXR7ng/video.html
Sorry, don't have any ideas for you on that. Good luck though!! If I find anything, I will put another comment here for you.
Love your engine test stand and muffler!!❤️
@@locallybuilt Thanks! Super low budget but it worked out well.
I have the same issue with it backfiring on my 1986 170 merc, anyone got a answer for that?
Timing was officially changed to 4° BTDC maybe that's your issue?
ho li fuk man everything you did was awesome except the paint job as I am from WI.
🤣 thanks! We are only Vikings fans so we can teach our kids disappointment early in life. 🤣
Question: I'm restoring a 1992 Bayliner classic that has no motor, but it has the Mercruiser Alpha I outdrive. Should I seek out a Mercruiser to rebuild or should I put another powerplant in it?
I am a big fan of mercruiser, but really don't have much experience with others. I am not impressed with the heat exchanger and cooling system of my engine (470).
@@locallybuilt I suppose I should just try to replace the 3.0 that came out of my boat. I was just wondering if there was an opportunity to upgrade it, since the outdrive is good. Thanks for your reply!
@@locallybuilt same feelings here Jason. I'm finding that out as I tear into my 40+year old 470 engine. It definitely could have been made simpler? And finding a new heat exchanger ain't cheap 😬
@@hankschrader149 definitely true. I replaced all the seals and it started leaking oil now. It hasnt been ran for a couple years, so that didn't help.
@@locallybuilt ouch. Where is it leaking oil from? I've got extra everything block, pistons etc.. it's about to all go to the scrap yard 😆. I ran mine 2 years ago for a summer and then it wouldn't start, Bent pushrod. So now I am waiting on my 2nd 470 from Michigan Motorz, 1st one was unsat!
Sir do you think I could face time u and show u and ask some questions. I’ll pay you for a consultation via face time on simple wiring I got disorganized
I have the same engine and would like to schedule a call can I take your number down
I probably wouldn't be much help, but I did upload the wiring diagram onto my channel czcams.com/video/JYzltDILxyI/video.html
Couple more links that will help, exploded diagrams, buy parts, and engine manuals
www.crowleymarine.com/mercury-outboard/908.cfm?mdl=8LJOIR&q=1986%20170%20hp%203.7
www.perfprotech.com/mercury-marine-parts-catalog/model/04/320/170%20%282%20BBL.%29%20%20MERCURY%20224%20I%2FL4%20%201985-1986/6916779-thru-0b434940
Doesn't even check clearances.. wtf
What clearances? If you are talking points gap, then yes that was done, checked and rechecked. Not every single step was videoed or photographed
LSU colors
As I watched I couldn't help but notice you just simply totally over looked all the fluid's in the engine .and instead of removing all the components attached to the engine you did what a total novice would do looking at from the top so you removed the valve cover and next was the rocker arm's when what really should have been done was a bit more methodical . You Tag & Bag every and all accessory parts then the ignition front pulleys starter motor with slave solenoid and solid state voltage regulator then carburetor heat exchanger with manifold and intake ..because these will need to be addressed prior to re installation .and after the engine is striped down then you lift the head and so on .. When you mentioned the valves were "Rusted shut" that was when I was 100 % positive you haven't seen the bottom side of to many head's before because if you had you would have never said such thing ..But good luck with this rebuild anyway ..
Apparently I am a better mechanic than video editor. Didn't get all the steps exactly in order but enough to show what was done. Since the valves were rusted shut and cylinders rusted tight so the engine wouldn't turn over at all, I'd say it wasn't normal. What kind of junk engines are you working on that you think that's they way they are supposed to look. I didn't think it was necessary to address removing engine fluids in the video. Seems like a fairly simple step any mechanic would know to do. Thanks for your comments, but maybe next time try to be more constructive and not so critical.