Bolt length and thread pitch

[merkdawg0084]

Hello guys I have a 1993 Evinrude 15hp rope start. I’m gonna put an electric start on this motor. Evinrude part# 0338751. This bolt is 11.99. Does anyone know thread pitch and length? Gonna try to go to local hardware store. Thx

 

[Crosbyman]

just try a few bolts from your bolt bin to get the pitch ...cut to size

 

[Vic.S]

Hello guys I have a 1993 Evinrude 15hp rope start. I’m gonna put an electric start on this motor. Evinrude part# 0338751. This bolt is 11.99. Does anyone know thread pitch and length? Gonna try to go to local hardware store. Thx

You sure you have the right part number

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[Chris1956]

Gee, American bolts are usually standard USS (fine) or SAE (course) thread. If you know the diameter, there are standard TPI for each bolt.

i.e. SAE thread 1/4" bolt is 20 TPI. 5/16" bolt is 18 TPI.

You might try to find out the grade of the bolt. A starter mount may require a stronger bolt like grade 5.

 

[merkdawg0084]

Ok guys, in the description it says screw not bolt, but I would think it would be machine threads? This is the screw that mounts the solenoid to the motor. Thx

 

[Chris1956]

Screw and bolt are often used interchangeably. Machine threads can mean fine or course, but not tapered threads like threaded pipe.

Sometimes the parts list will give a bolt size, and sometimes bolt length. You can measure the depth of the threaded hole and usually see whether the threads are course or fine. This will give a reasonable guess as to the bolt length. You can also try short bolts in the threaded hole to match the bolt size and threads.