Crankcase Taper Pin ?

[gpsguru]

1997 Johnson 70 (3 cylinder) full remote.

I have the powerhead off now and will be pulling the crankcase apart to take out the seized / broken up piston (No3). There is a whole section in the workshop manual about being mighty careful when removing the taper pin that aligns the crankcase half?s. It details making a special tool to remove the pin. I am happy to make the tool but to not want to waste unnecessary time ???.normally for taper pins we would use a pin punch or just tap the two half?s apart using a block of wood. As I have never had a Johnson crankcase apart before what is the deal with the taper pin and how do you guys split the crankcase ?

 

[oldcatamount]

Re: Crankcase Taper Pin ?

After all the bolts are out, take a mallet and give the top section of the crank a smart tap. That will break the seal between the two sections. You may not have to mess with the taper pins at all.

 

[Chinewalker]

Re: Crankcase Taper Pin ?

I've always tapped them out with a punch - never had an issue with them...

 

[boobie]

Re: Crankcase Taper Pin ?

I too have also tapped them out with a loooooong punch. Never did make the tool. Punch always worked fine.

 

[Dhadley]

Re: Crankcase Taper Pin ?

We always used a punch too. Seen many front halves split at the pin because someone didn't take the pins out and tried to force the front off. Never bothered with the too either. I think the plans for the tool ended up in the junk pile with the rod alignment tool.....

 

[boobie]

Re: Crankcase Taper Pin ?

A good sharp lead pencil is still as good as that rod alginment tool.

 

[nymack66]

Re: Crankcase Taper Pin ?

All good pointer for the FAQ section. Create a section on tips and tricks maybe a good idea? Thanks for posting the question and the follow up posts. I really enjoy reading some meat and potatoes in while