Specs for 1964 2-cyl 40 hp Johnson Electric motor?

[mmaddox]

Anyone have the following data:<br />* Minimum compression<br />* Spark plug gap<br />* Other vitals?

 

[bubbakat]

Re: Specs for 1964 2-cyl 40 hp Johnson Electric motor?

compression should be around 100 both cyl should be within 10% of each other<br /><br />plug champion J4C gap 30<br />fuel mix 24:1

 

[JB]

Re: Specs for 1964 2-cyl 40 hp Johnson Electric motor?

There were three 40hp models in 1964, RD-26, RDS-26 and RK-26.<br /><br />They shared the same 3-3/16" X 2-3/4" 2 cylinder, cross flow block. <br /><br />Ignition was by dual Phelon type magneto; points set at .020, Champion J4C plugs gapped at .030<br /><br />Compression on a healthy engine might range from 80 to 125psi, depending on the guage, conditions and technique, but the cylinders should fit within a 10% spread.<br /><br />OMC specified a fuel mix of 24:1, unleaded regular and TC-W3 are appropriate.<br /><br />Good luck.

 

[Lark40]

Re: Specs for 1964 2-cyl 40 hp Johnson Electric motor?

The fuel/oil mix was 50:1 for 1964. That was the first year for that mix.

 

[JB]

Re: Specs for 1964 2-cyl 40 hp Johnson Electric motor?

The Johnson Service Manual for 1964 and earlier models and the Glenn's Johnson Motor Repair and Tune-Up Guide specified 24:1.<br /><br />RD engines later than the RD-14, and the RK engines did have "frictionless" bearings throughout, so it is probably safe to use a 50:1 mix, but do it at your own risk.<br /><br />I have not seen an OMC document that said 50:1 for 1964 engines.

 

[Lark40]

Re: Specs for 1964 2-cyl 40 hp Johnson Electric motor?

JB,<br /><br />Here's the 1964 Johnson catalog advertising 50:1 ratio. - Check bullet number 9 on the gold panel.<br /><br />It's also in the 1964 Evinrude catalog on that same site. <br /><br /> http://mitglied.lycos.de/old_omc/j_1964/seite_11.jpg

 

[JB]

Re: Specs for 1964 2-cyl 40 hp Johnson Electric motor?

Thanks, Lark.<br /><br />Now I HAVE seen it in writing.

 

[bubbakat]

Re: Specs for 1964 2-cyl 40 hp Johnson Electric motor?

thanks guys i was unaware of that to. OH well learn something everyday uh.

 

[mmaddox]

Re: Specs for 1964 2-cyl 40 hp Johnson Electric motor?

Well I screwed up. I mistyped the year. It is 1969. I will post another topic so that there is no confusion for other iboats readers who look up this topic for 1964.<br /><br />I am so sorry I screwed this up.

 

[rickdb1boat]

Re: Specs for 1964 2-cyl 40 hp Johnson Electric motor?

mmaddox <br /><br />It happens! Don't sweat it. The good thing is, all the info stays the same for the 1969 Model. Plug, Gap and 50:1 mixture still hold true. Good Luck,