Home › Forum › Ask A Member › Johnson 4 HP impeller › Re: Johnson 4 HP impeller
If Doug’s method does not work, please do not grab the lower portion of the driveshaft with vice grips or anything else that will damage the sealing/bearing surfaces of the lower driveshaft…
Removing the powerhead is easy and will give plenty of access to the driveshaft without worrying about damaging sealing/bearing surfaces…
Once the driveshaft is out, be sure to clean up the splines well. Next, tip the powerhead upside down so its splines can be filled with light penetrating oil such as WD40. Now, work the driveshaft in and out of the crankshaft many times to remove as must rust as possible…
Yeah, the plastic pump hsg was probably wrecked when the driveshaft key pulled through it…Use a complete water pump kit…
Reinstalling the gearcase is a challenge for sure. Using your fingers to blindly guide that shift rod back down through the gearcase opening requires some luck indeed….Either they just pop into the gearcase no problem, or you will spend plenty of time, using creative language, to coax the driveshaft back through the elusive shift rod hole….