Home › Forum › Ask A Member › 1962 Johnson 10 hp
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fleetwin.
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March 13, 2024 at 5:51 am #285897
Thnakyou Seakaye 12 for posting Mumbles pics. There is a big difference in the Poston an pins…I can see why the 61 _63 are better now.This leaves me with another question? I have a 1956 Evenrude 10hp..This means it has the old rods also…The 57 in pic is a smaller rod than the 59..So my 56 has weak rods an pistons also?? It has original paint on it .It looks and runs like a brand new motor., It is strong..Will push a 13 ft fiberglass dixie 17mph…with just me an tackle..2 people an tackle little around 12mph.I shure hope it does not mess up a rod.I have learned a lot from you all on these motors.I thankyou all for the valuable info…Thankyou
March 13, 2024 at 10:14 am #285902Look at the wrist pins. The “weakness” was the pin diameter. The smaller pins would beat out the hole through the pistons and become very loose. Incasing the pin dimeter gave them a much larger contact surface area inside the hole Also note the wrist pin bearings, The new ones were huge in comparison. in fact, they are the same bearings as used in the 40hp and V-4’s. BTW, the ’61-’63 parts can be used in the older motors. But you have to do the whole thing—pistons, rods. wrist pins, snap rings, and bearings, If you look at the parts list for the older pistons, it will show a list of the parts that are needed for update.
March 13, 2024 at 10:58 am #285915Thankyou frankr
It is good to know that the newer pistons an rods can be used in the older motors.This is valuable info.I have learned a lot from you all about these motors an how to ,an what to do and not to do..I sure hope the 1956 10hp. holds up….if not i now know how to start to fix it…Thankyou again…all of you..for the valuable info
<!–more–>March 13, 2024 at 1:48 pm #285918Thankyou frankr
It is good to know that the newer pistons an rods can be used in the older motors.This is valuable info.I have learned a lot from you all about these motors an how to ,an what to do and not to do..I sure hope the 1956 10hp. holds up….if not i now know how to start to fix it…Thankyou again…all of you..for the valuable info
<!–more–>It is easy to determine if you old 10hp has loose wrist pin issues. Get the pistons in mid travel (with the plugs out), and rock the crank back and forth just slightly to feel for slop. You can usually hear a ticking noise while the engine is idling if you have this issue as well. I use 16:1 in my older 10hps, hoping the extra oil might help protect against this issue.
March 13, 2024 at 6:11 pm #285926Thankyou fleetwin
..I just now pulled the plugs on the 56 evenrude 10 hp…and you are right.I can feel just a little bit like you said.I also checked the compression with same gage that I used on the 62 10 hp…the 56 is showing 70…top an botom…the 62 showed 60 top an bottom..I don’t now if the gage is right or not.came from Orillieys auto.I been running 24 to 1 on the 56…I will start running 16 to 1 ..like I do my 5.5 s an 7.5 s..
March 13, 2024 at 6:20 pm #285927Thankyou all so much for all the valuable info.I have truelly learned a lot from you all.I have like 16 of these old evenrude an johnsons..from from 1952 to 1969..an from 1.5 hp up to 25hp…I enjoy running them an working on them.Guess I got more than I need though..lol…Lord willing, I will be 68 this fall.Just now getting my strength back from my second heart attack.Thankyou ,all
March 13, 2024 at 8:04 pm #285929Thankyou all so much for all the valuable info.I have truelly learned a lot from you all.I have like 16 of these old evenrude an johnsons..from from 1952 to 1969..an from 1.5 hp up to 25hp…I enjoy running them an working on them.Guess I got more than I need though..lol…Lord willing, I will be 68 this fall.Just now getting my strength back from my second heart attack.Thankyou ,all
All the more reason to enjoy life and your outboards! Those old 10hps are great engines, even with their engineering flaws
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