Topic: 75 hp Johnson Stinger – Antique Outboard Motor Club,Inc

This topic has 11 replies, 7 voices, and was last updated 7 years, 6 months ago by 1aquaholic.

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May 13, 2017 at 5:15 am #7001
1aquaholic
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Ok guys I need some advice. I’m looking for a 75 hp Johnson Stinger or the Evinrude equivelant. What years were the most reliable? I want something with trim & tilt & short shaft. I’m wanting to put this on a 16 ft Aristcraft Torpedo. I would install dual cable steering for sure. I know it’ a light boat and this motor "might" be a little overboard, but I’m a pretty experienced boater. Ran hydros in my early years, rigged fast boats, etc. What I’m really looking for is reliability. So what years do I need to "not" consider and what years were known for reliability? Give me all the pros and cons, building tips, speed tips, etc.

Thanks!
1Aquaholic
May 13, 2017 at 9:44 pm #57659
garry-in-michigan
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Lifetime Member
A man after my own heart – In the early ’50s I ran a modified Big Four on a 14′ Speedliner @ 54 MPH and in the early ’60s a modified V4 (with a "Fat Fifty" motor cover) @ 65 MPH – Have a blast . . . 😆
May 13, 2017 at 11:03 pm #57661
frankr
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US Member
Evinrude had their Sport models too.

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May 13, 2017 at 11:03 pm #57662
chris-p
Participant
The 1979 Johnson Stinger is one of my all time favourite motors, ever.

If you can find the 15" shorty, they are a rare bird sort of. Much more of the 20" versions around so it seems.
May 13, 2017 at 11:45 pm #57665
chris-p
Participant
Sorry, should have mentioned as well. The short shaft (racing model) did not have power TNT, which you wanted. The long shaft did however.

The actual cases are different as well. Short shaft had what they called the Sprint Drive. Smaller than the long shaft cases.

The Stinger gets its extra RPMS from having smaller wrist pins and bearings, that are closer to the top of the piston, with longer rods. Carb is different than the standard model as well if I remember correctly.

They really don’t need much work to make em scream. Mild exhaust port work, shaving the head, getting the compression up to around 180 psi, proper setup, and proper prop, with correct jetting, will get you going. Going quickly too.

If you find one with some hours on it, open her up and change out the rings and hone cylinders. Once the cross hatch is gone, they lose low end power.
May 15, 2017 at 3:22 am #57732
1aquaholic
Participant
Thanks for the info! I didn’t know they made the smaller gear case. So are they or parts hard to find? So If the short shafts didn’t have TNT, what did they use? How did they trim it out? Or didn’t they? What kind of props did the smaller gear cases use? Pitch?
Could you use an aftermarket TNT on these motors?
Knowing now that the short shafts had a different gear case and no TNT, this may change my motor options. Any other ideas on what to use? Nothing against Mercurys, but I grew up on Evinrude & Johnsons, so I want to stay with these brands.
Thanks for the input!
1Aquaholic
May 15, 2017 at 11:09 am #57743
fleetwin
Participant
US Member - 2 Years
I don’t think you will have much trouble finding parts for the smaller gearcases, similar units were used on the two cylinder engines for years, although the driveshafts are probably unique. I’m sure there are outside vendors that make some sort or trim/power trim for these engines…
These are great engines, but plan on doing a total powerhead rebuild on any used engine you find, it has probably been used hard and is ready to be "refreshed". Like others have said, piston skirt cylinder fit is critical on these engines. Simply honing and re-ringing is not going to address this issue.
May 15, 2017 at 2:46 pm #57754
dsaulsbury
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US Member
I have two Stinger/Hustlers. One is a long shaft 1975 Stinger on a Hydrostream Vixen. I am messing with jacking it up and will add a nosecone. It has the large gear case w/3 water pickup holes. The other is a 75 Evinrude short shaft and has the small bullet w/4 water pick up holes. The large gearcase gear ratio is 12:29 and I am using a 22" pitch prop. The small gear case ratio is 15:28 and I am using a 17" prop and get 52 mph @ 6000 rpm. The G3 also has a steering bar and tilt and trim. These motors are still raced and the tilt/trim is a unit used by the racers.

1Aquaholic check your private messages.

Don
May 15, 2017 at 3:10 pm #57755
chinewalker
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US Member
Not sure where the different pistons & rods were used, but my 1980 Johnson Stinger 75 uses the same rods, pistons and crankshaft as the 70 of the same year. All the 49 cubers were the same bore & stroke. There might have been some changes as you moved into the Mod 50 and SST60 motors, but the stock service motors all used the same innards. Differences for the extra 5 ponies were usually in the area of minor porting, carb and cylinder head changes, again, depending on the years involved.
May 15, 2017 at 3:22 pm #57756
1aquaholic
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Don, I checked my private messages and there are non in my in box??
You can email me at: schneiderg2001 at yahoo.com

Thanks!
1Aquaholic
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