1962 - 75 hp Johnson - Lake Trial …. Finally! Part 8

This is part 8 of an eight part series after bringing this motor back from the dead. The owner brought this boat to me after three marinas tried and failed to get it running.
It took some time and effort but soon it was idling well with the final test at WOT to determine if this motor was worth saving.
Please make comments and share your thoughts as how you think it’s running now and whether this motor is worth moving forward with tuning it up even better.
Part 1: Will it Run?
• 1962 75 hp Johnson - P...
Part 2: Stalling & Revving at WOT
• 1962 75 hp Johnson - P...
Part 3: Stalling at WOT - Fixed - Carb & Fuel Pump Clean - Lake Test
• 1962 75 hp Johnson - P...
Part 4: Hard Starting - Bad Reeds & Setting Timing
• 1962 75 hp Johnson - P...
Part 5: Reed Block & Distributor Swap
• 1962 75 hp Johnson - P...
Part 6: Link & Sync
• 1962 75 hp Johnson - P...
Part 7: Re-Cap of Link & Sync and Running
• 1962 75 hp Johnson - P...
#outboardrepair

[@higg1977]

Cool old rig. Good to see it running! I'm not familiar with the cooling system on that ol girl. I see a lot of steam? Seems to be running great regardless 🇺🇸

[@georgekeats1478]

OMC switched to 50:1 in 1964. So this beauty should be 24:1. But please consult a manual to be certain. Runs great. Good job on saving it. Most people today would have scrapped it. It's great to hear that the owner stuck with it. There can't be too many 1962 75hp JohnnyRude's left running.

[@LivetofishOutboardRepair]

@georgekeats1478…. Actually the owner was running 40:1 and your right the service manual requires 24:1 but I think todays TCW3 are so good that it will not harm the motor even at 40:1. OMC switched to 50:1 in 1964 because this is when they designed the motors with roller bearings instead of brass bushings. Thanks for sharing your thoughts and suggestions. It’s very much appreciated.

[@georgekeats1478]

My philosophy is if OMC said 24:1 then 24:1 it is. How can we really tell if 50:1 with modern oils is okay? We can't, until it's too late. For what it cost extra I say be nice to the old girl and giver her a little extra, like 20:1. Oil is nothing but beneficial to these engines. Even my 50:1 engines I run at 45:1. @@LivetofishOutboardRepair

[@silverstarflite135]

Very cool to see an old V4 still running. My dad had a 1966 80hp. Sounded the same. But man, your steering needs tightening!

[@joeatkins]

AMAZING! I'm looking to accomplish the same thing. I have a 1967 Johnson Super Seahorse 80 Electramatic One guy told me to get rid of that dinosaur and find something newer to tanker around with. Went to the UPS store in Lansing Mi to deliver a package and the clerk says don't get rid of it. Work on it and in the end you won't regret it. So here I am.

[@LivetofishOutboardRepair]

I looked up your 80 hp on www.marineengine.com I believe this is the correct model number V4S-19. They have one wiring harness in Stock for $67 + Shipping.

[@joeatkins]

@@LivetofishOutboardRepairGreat thank you

[@jims4539]

First! Waiting on a fuel pump kit to keep the rebuild going - so first is all I got until 'before 10pm on Monday" according to the big A. Thanks for your videos.

[@LivetofishOutboardRepair]

@jims4539… we’ll, in the mean time please watch all videos in this 8 part series to see if they help you with your motor. Thanks for watching and sharing your story. Keep us posted on your progress.

[@pjimmbojimmbo1990]

That motor is fine with 50:1 OMC made no changes to the Powerhead in 64, except for a Tin Plating on the Pistons which wore off during Break In. When they switched to 50:1 there weren't even TCW Cert Oils yet Granted if the upper Crankshaft Seal is worn, 24:1 will maintain the Pressure Differential a bit better.

[@LivetofishOutboardRepair]

That's great information. Thanks for posting your knowledge and expertise.

[@chamberizer]

I have a 1962 Evenrude 75 hp Starflite 4. It maybe same engine. Mine still.runs good too. I use premium gas with Pennzoil semi synthetic marine 2 stroke oil, 50:1 & Champion J8C plugs. I think the book says to use 24:1 but that was using straight 30 weight. I had two different mechanics say to use 50:1. There is some kind of certification (I think "TCW3") that should be on whatever 2 stroke oil you use. The spark plugs stay clean using the Pennzoil as described. Make sure to use the correct rotor. Magneto rotor has a longer connect length & is not correct but will fit. I have owned almost 30 years. I replaced the Float in the Carburetor once. You may want to inspect the plastic components inside the thermostat block. I replace at one time the rubber diaphragm in fuel pump - just because it came with in a package that included a new fuel filter. I was told the new diaphragm was made for modern gas. My power head has been reliable. As explained in the shop.book the Automatic position of the choke is not reliable. I choke only when initially starting. I upgraded to an electronic voltage regulator when I first bought boat. The rectifier is original. The ignition Coil is original. Good Luck!

[@LivetofishOutboardRepair]

@chamberizer… That is great information. Thank you for taking the time to share your experience. I was able to obtain a service manual for this motor and confirms what you describe. Thank you again for watching and commenting.

[@blainerockey6843]

I bought a1960 Thompson boat last fall for a project boat. Has the original 75hp Johnson motor. Haven't started it yet. Not seized up. You're videos are very helpful. Any suggestions you may have would be greatly appreciated

[@LivetofishOutboardRepair]

I would suggest pulling the spark plugs and examine them to see how each cylinder was firing. Check compression on all cylinders, a healthy motor should have at least 80 psi and within 10% of each other. Check for strong spark on each cylinder should jump at least a 1/4” gap.

[@mikesoresina7022]

I guess 2 strokes have not been legal for many years now and were banned on the lakes in California, where are they allowed these days , my dad owned a 1967 johnson 60, we all loved it so much , and alot of fun in the boat .

[@LivetofishOutboardRepair]

Still legal in the Great Lakes and Lake St. Clair in Michigan.

[@Groner5]

Any chance your close to Minneapolis? Sound minnesotan and I have two Johnsons I am having issues with

[@LivetofishOutboardRepair]

Sorry to hear your having issues but I live in MI

[@joeatkins]

Any of you guys in the close proximity of Lansing Michigan?

[@LivetofishOutboardRepair]

I live in Sterling Heights

[@joeatkins]

@@LivetofishOutboardRepair I need some advice and help. As I stated I have a johnson seahorse 80. the V$AL-19m. The wiring harness is still attached but its cut. I managed to get another controller but I need getting the wires attached back.

[@LivetofishOutboardRepair]

@joeatkins try looking up your motor on www.marineengine.com and search for the wiring harness part number and cross reference it on ebay.

[@patricklions9066]

Hello, how do I contact you about getting some work done? Need lower unit seals on 1971 Chrysler 45hp 457hc. I could ship the lower unit to you and pay how ever you like. Thank you, Daniel

[@danielrobert7181]

Now, of course it will run fine ... its an OMC. You've been playing around with Mercurys too long. Ha, ha ! By the way, It will run great with a 50:1 ratio if you use synthetic TWC-3 {letters stand for "Two- stroke Water Cooled"). Watch out, your typical chainsaw 2-sroke oil won't do as it is formulated for air cooled engines which runs at higher femperatures. Regards !

[@LivetofishOutboardRepair]

@danielrobert7181… Maybe your right about the Mercs the OMC aren’t as complicated. I wonder what the 3 is in the TWC though. Thanks again for watching and your reply.

[@walleyegil]

nice job. as usual

[@mikeperry6794]

That is not a 62 unless you changed the cowling.

[@LivetofishOutboardRepair]

You are correct the cowling was changed, but the motor is a 62. You are very observant. Good catch.