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1964 Sport Four "CLUNK"

W

weebeastie

New member
Hello All,
Just got my 1964 Evinrude Sport Four in the water for the first time. She started up with a little starter fluid and idled. We took off from the dock and putted out to deep water. on opening up the throttle a little there was a loud "CLUNK", the whole boat shuddered and then kept on going. A few seconds later the same thing and again and again all the way back to the dock where she idled fine again. Motor seems fine with a sluggish response to throttle the only notable problem. She is not spitting water so the impeller must be trashed. I am going to remove the lower unit and get into it. When I bought the boat there was water in the lower unit and no oil. I filled it with oil before we went out and noticed a PC7 repair where it had hit the bottom sometime in the past, there seems to be a slight leak by the pimple on the fin.
The clunking feels like the prop is locking up and releasing or the transmission is momentarily shifting into neutral and back into gear.
Back at the dock she shifted happily into forward and reverse and pulled on the docklines. There was still the odd clunk every few seconds.
Could this be a fuel delivery thing?
Help! What could be wrong?
Thanks,
Wee Beastie
 
The "clunk" sounds like a shift dog and forward gear prob. Also the shift cradle could be worn from having water in it. G/C has to come apart.
 
Thanks for that Boobie,
Am in process of removing Gear case. One of the screws on the gear shift linkage cover is seized and am soaking that in PB Blaster overnight. If that doesn't work will bust out the propane torch to loosen things up. Makes me nervous to use it around all this aluminum though, any ideas on that?
Thanks for your response,
Wee Beastie
 
use it, propane isnt hot enough to melt aluminum,BUT use just enough to break the screw loose.One of the strike type screw breakers is a fine tool just for motors.I cant remember the actual name,but its a screw driver that you can set as a rachet type screw driver and on stuborn screws you strike it with a hammer,the force breaks the screw without stripping the philips head.
 
It's called an Impact Driver. I've got two of them and it's one of the best tools I've ever bought for working on outboards. If propane isn't hot enough you can also use mapp gas.
 
i have a 1964 v4 and found out that the water only sprays out the 1 inch hole when the motor is hot enough to open the thermostat and then just prays out not like the pee hole type. on this motor most the water goes out the bottom with the exhaust. also my motor had a loud clunk it was misfiring the plugs were back wards on the 2 and 4 cylinder so start with the simple stuff first
 
Right, here we go.
Motor was jumping out of forward gear so tore down Gear Case and found clutch dog ears only slightly worn. The problem is almost 1/4 inch slop in gear shift linkage. Detent adjustment is set at all the way up. 1/4 inch play is evident in all gears (forward, neutral and reverse).
Slop is at the top of the upper shift rod where it attaches to lever on end of shaft. Can barely see it by peering up the inner exhaust cowl into the dark. Either lever is loose on top of upper rod or loose on shaft (I suspect the latter). There is an inspection cover on starboard side which when removed exposes the grease nipple on the end of shaft.
Question: just how much work is this going to take to fix?
Does the power head have to come off or is there another way to get to this damn thing?
I'm tempted to use the hole in the side of the motor where you access the shift rod connector to jury rig a shift mechanism and bypass the whole stupid upper arrangement and remote control or just to put it back together and lock the thing in forward gear.
That would make for some extra entertainment on the water!
Any ideas would be surprising as well as appreciated.
Wee Beastie
 
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