evinrude 40 hp 1964 impeller question

[chestercheese]

hello to all you good people


just wondering if anybody can help me?
i'm trying to change the impeller and water pump on my evinrude big twin 40hp,
i've taken all the bolts out, (that i know of?) but just cant seem to shift the gear box, there is a little bit of play but just wont drop, any help from you guys would be great,
many many thanks dan

 

[ezeke]

Re: evinrude 40 hp 1964 impeller question

I believe that you will find an oval plate held on by two screws, behind which is the coupler that connects the two sections of the shift rod.

Remove the bottom screw from the coupler.

You may need to use the shift lever to apply enough pressure to release the coupler.

 

[lindy46]

Re: evinrude 40 hp 1964 impeller question

Also you have to remove the rear exhaust housing to get to the big bolt at the back of the motor. It goes through from the top and is hidden from view with the exhaust cover on.

 

[chestercheese]

Re: evinrude 40 hp 1964 impeller question

hello
thanks for that info, yeah i've got the exhaust bolt off, i've taken the top bolt out of the gear shift as the bottom one has a nut and bolt and i cant get two spanners in there? does it have to be the bottom bolt or will the top one do? thanks for your quick replie

 

[ezeke]

Re: evinrude 40 hp 1964 impeller question

Either will work. Usually you can move the shift lever to line it up.

When you put the screw back, be sure to line up the rod first so you don't lose the threads on that one as well. Those connectors are now listed at around $18. - without the screws.

 

[chestercheese]

Re: evinrude 40 hp 1964 impeller question

hello again
when you say its hidden do yo mean the long bolt at the back of the engine just above the prop? i had to take the cover off to get to it, ive taken the top bolt out of the gear shift but the rod is still stuck, do i just need to give it a good old yank to seprate? cos i have got it to drop about 2mm but wont go any more, i think its cause the gear shift is stuck

 

[ezeke]

Re: evinrude 40 hp 1964 impeller question

See if you can spread the connector/coupler a little.

 

[chestercheese]

Re: evinrude 40 hp 1964 impeller question

hello
yeah will do, i'll let you know how i get on tomorrow, thanks again for all your help cheers dan

 

[chestercheese]

Re: evinrude 40 hp 1964 impeller question

hello

thanks for your help yesterday,
i managed to get the gear box off, just got to get these horrible screws out, not looking forward to that, they are only flat head screws and are very very tight, i'll let you know how i get on, or shall i say how many i shear off????

thanks again for all your help
cheers dan

 

[lindy46]

Re: evinrude 40 hp 1964 impeller question

Do you mean the bolts holding the impeller housing on? Soak them with penetrating oil before trying to remove them and hopefully they'll come out.

 

[chestercheese]

Re: evinrude 40 hp 1964 impeller question

yeah but they are flat head (or spade heads) which will make things harder if they wont shift

 

[tootallofwa]

Re: evinrude 40 hp 1964 impeller question

This may help...
http://www.youtube.com/watch?v=VnTx_WtUpig&feature=related

 

[chestercheese]

Re: evinrude 40 hp 1964 impeller question

Do you mean the bolts holding the impeller housing on? Soak them with penetrating oil before trying to remove them and hopefully they'll come out.

hello

just to let you know, all three screws sheared off, left them soaking all night but did'nt help,
still i've drilled and tap'd them all so good as new, the pump hausing was really clogged and the ends of each impellar fins were broken off and stuck in the pump, so on the bright side, its all clean'd and just waiting on the impellar kit to arrive, any other tips on what i should do when re-assembling?????

thanks for your help
cheers dan

 

[tx1961whaler]

Re: evinrude 40 hp 1964 impeller question

hello

just to let you know, all three screws sheared off, left them soaking all night but did'nt help,
still i've drilled and tap'd them all so good as new, the pump hausing was really clogged and the ends of each impellar fins were broken off and stuck in the pump, so on the bright side, its all clean'd and just waiting on the impellar kit to arrive, any other tips on what i should do when re-assembling?????

thanks for your help
cheers dan

I've had to drill and retap most of the impeller housing screws on my motors....they are a weak spot in the design, especially for a saltwater motor.

 

[lindy46]

Re: evinrude 40 hp 1964 impeller question

any other tips on what i should do when re-assembling?????

thanks for your help
cheers dan

Make sure there is an o-ring/seal at the top of the driveshaft before re-inserting. Also, grease the splines at the top, but don't put any grease on the end of the driveshaft - just the splines.