Remove lower unit from 8HP, need help

[Bill kubiak]

Got a Johnson J8RCUD and I am trying to make it ready for the season. <br />I cannot remove the lower unit to change the water pump, it seems stuck, it drops about 1/4 inch and thats it.<br />The manual just says to remove the three bolts and pull the unit off.

 

[roscoe]

Re: Remove lower unit from 8HP, need help

My manual says the same thing.<br />Remove the front/top screw.<br />Remove the two rear/lower screws.<br /><br />Have you tried gentle persuasion?<br />Has it been in saltwater?<br />When was the last time the lower unit was removed?<br />Can you push the lower unit back up into position?<br /><br />Wiggle wiggle wiggle???<br />Driveshaft and shiftrod should slide out according to my manual.<br /><br />Manual says put it in forward gear, maybe that will make a difference.<br /><br />

 

[Chinewalker]

Re: Remove lower unit from 8HP, need help

I have seen a number of those little twin-cylinders with rusted crankshafts, resulting in the driveshaft being stuck in the crank. <br /><br />HOW TO DEAL WITH ABOVE SCENARIO: Don't be surprised if gentle pursuasion results in the unit coming off without the driveshaft. The waterpump pin may nick the pump housing on the way out, but it shouldn't hurt anything else. Your next issue is removing the driveshaft. My recommendation would be to remove the powerhead to offer better access to the driveshaft. You can then put a pair of ViceGrips on the shaft, mid-way up and tap it out of the crankshaft without buggering up the shaft's bearing surfaces. If all goes well, replace the driveshaft into the lower unit, replace the base gasket on the powerhead and re-install on the exhaust housing. You're now ready to continue with the waterpump service. BE SURE TO THOROUGHLY GREASE THE DRIVESHAFT SPLINES PRIOR TO REASSEMBLY!!<br /><br />- Scott

 

[JB]

Re: Remove lower unit from 8HP, need help

Moving to JohnnyRude Troubles.