Can anyone identify this Johnson Super Seahorse 80?

[Agent Becker]

Hi!<br /><br />Please have a look at these pictures:<br /><br /> http://www.schoenmueller.com/index.php?_seahorse <br /><br />Does anyone have a clue?<br /><br />The Modellnumber is: GM 75C<br />The Serial Number is: J25 80 309<br /><br />The sign also reads: 75 Horsepower run from 4500 to 5000 rpm.<br /><br />We know it's a 2 Stroke V4. The previous owner mentioned that it was probably in Army use, there the strange SN?

 

[jimmbo]

Re: Can anyone identify this Johnson Super Seahorse 80?

That motor is older than a 1969. 68 was the last year the V4s were built like that. In 1966 - 67 Evinrude/Johnson made an 80hp model like that. Rpm range was 4000 - 5000. A 75 horse was made from 1960 - 65. again rpm range 4000 - 5000

 

[ledgefinder]

Re: Can anyone identify this Johnson Super Seahorse 80?

The motor has a magneto, a two-barrel downdraft carb with fixed high-speed and adjustable low-speed jets, and a mechanical shift lower unit. <br /><br />I believe those characteristics place it as 1958-1966, and 80hp or less. The 90hp has an inline 4 barrel carb, and I 'think' 1966 is the last year for the magneto. <br /><br />I can't tell you more than that. It looks nearly identical to a 1966 80hp Evinrude that I have, except as you say it's painted military green. My best guess is it's a 75hp Johnson from 1966 or slightly before that.

 

[jimmbo]

Re: Can anyone identify this Johnson Super Seahorse 80?

1967 was the last year for the magneto, and 65 was the last year for the 75hp

 

[Agent Becker]

Re: Can anyone identify this Johnson Super Seahorse 80?

Thanx Guys!<br /><br />We're narrowing it down ;-)<br /><br />The weird thing though, ist that the hood reads Super Seahorse 80. Could somebody have switched it?<br /><br />Since it definetely seems to be a 75 HP and being built in 65 at the latest, what fuel/oil ratio should we use? 50:1?

 

[seahorse5]

Re: Can anyone identify this Johnson Super Seahorse 80?

The 80hp was only made in '66 and '67. '66 models were an off white color called French silver. '67 models were a light green color. Therefor yours is an '67

 

[Agent Becker]

Re: Can anyone identify this Johnson Super Seahorse 80?

Originally posted by seahorse:<br /> The 80hp was only made in '66 and '67. '66 models were an off white color called French silver. '67 models were a light green color. Therefor yours is an '67

Hi!<br />If I could be sure, that nobody switched the hood, we'd have a winner! But, like stated, the Johnson Engine Tag reads 75 HP ?!?!?