93 evinrude waterpump

[itsaboattime]

My brother-in-law just picked up big ol 24 foot toon with a 1993 70hp evinrude model # ve70tlets. VRO has been disconnected. That has been sitting for two years.

I told him to take it for a ride, do a compression test, check the lower unit oil, and listen for knocks and pings BEFORE he bought it. He didn't listen.

I told him to swap out the water pump, clean/rebuild the carbs, and do a decarb after he bought it, BEFORE he took it out on the river. He didn't listen.

Long story short. He took it out saturday afternoon on the river and the water pump crapped out and the alarm went off. He shut her down immediatly and got a tow back to the dock. Then he calls me. I haven't started working on it yet.

There are a few things I wanna ask everybody here before I start. Yes I know I need a manual. But how different is changing the water pump from my '83 Johnson 50hp?

He reports no knocks or pings but he seems to believe it is dropping a cylinder at higher RPMs, wondering what would cause that??

When a VRO is disconnected shouldn't the fuel pump be replaced? How do I tell if it has??

I have no compression test yet and will probly start on it Sunday. I will do all my tests and post them to this thread. I just kinda looking for a heads up as to what im in for when I start working on this outboard.

 

[jtexas]

Re: 93 evinrude waterpump

it's the same as your 50, unless the 50 has that 2-piece shift rod that comes apart behind a panel on the exhaust housing. The 70 shift rod disconnect is under the bottom carb. And there's two bolts up under the antiventilation plate, one of which is inside the torque tab cavity. Otherwise if you done one, you've done the other.

The 3-cylinder, there's no "seems to believe" -- if a cylinder drops out at high speed, the boat drops off plane.

 

[HybridMX6]

Re: 93 evinrude waterpump

I have just finished rebuilding a 60hp version of this motor. LU is easy as stated above. If you are rebuilding carbs as well, just take them off before pulling the lower, it will make getting to that shift rod bolt a lot easier. His dropping a cyliner could be just dirty carbs and he's losing power at top end due to clogged high speed jets. I'd rebuild all 3 carbs, do the water pump at the same time, and also check spark just for the heck of it, then take it out on the water and see what happens.

 

[itsaboattime]

Re: 93 evinrude waterpump

it's the same as your 50, unless the 50 has that 2-piece shift rod that comes apart behind a panel on the exhaust housing. The 70 shift rod disconnect is under the bottom carb. And there's two bolts up under the antiventilation plate, one of which is inside the torque tab cavity. Otherwise if you done one, you've done the other.

The 3-cylinder, there's no "seems to believe" -- if a cylinder drops out at high speed, the boat drops off plane.

He never took it up to wot. it started sounding like it was missing and he backed it back down. And like I said, then the water pump gave out.

 

[kenmyfam]

Re: 93 evinrude waterpump

Do a compression and spark test and post the results as well as doing the water pump service. All lower unit dropping is basically the same principal.

 

[tashasdaddy]

Re: 93 evinrude waterpump

you obviously know atleast the basics, with your good questions. before anything. do the compression and spark test. see if you still have a viable base to work on.

as said remove the carbs, mark them with a sharpie. then you can get to the shift rod easily. while you are at it, change all the fuel lines, use B1 rated alcohol resistant lines. be sure to pump fuel thru the lines before connecting to carbs, this way any trash gets clean out.

it was not necessary to change the fuel pump to disable the OMS pump (does not have VRO) it was just unpluging connectors, and plugging the oil line.

 

[itsaboattime]

Re: 93 evinrude waterpump

Thanx guys. I will let you know what I find out on sunday. He has bought the parts - impeller & seals, carb kits. I am going to change the L/U oil and change the seals there too.

I'm gonna make him sit right next to me and watch how this is done.

I have already dumped SeaFoam into his gas tank.

 

[tashasdaddy]

Re: 93 evinrude waterpump

VRO conversion w/ pump still working

if the fuel side on your Pump is still working it is very simple. unplug the 2 line harness going to the oil tank, unplug the 3 or 4 wire harness, going to the Vro pump. cut and cap the oil line going into the motor. add oil to fuel tank, mix well, then remove fuel line at top carb, catching gas in a container, pump the fuel line bulb until you get premixed gas to the carb. you can tell as it will change color. put line back on carb, and go boating.

 

[itsaboattime]

Re: 93 evinrude waterpump

Thanx TD. Your the greatest.

He also asked me to troubleshoot his navigation lights.............

you know the old saying about picking your friends and being stuck with your relatives....................

 

[itsaboattime]

Re: 93 evinrude waterpump

Ok...........just got back from a long day. The Compression #'s are

#1-135
#2-137
#3-140

Spark is good on all cylinders. Number 3 lit up my life when he it the key a lil early.............lol.

The carbs were all varnished up. I pulled them yesterday and let them sit all night in cleaner. Rebuilt them today.

The impeller came out in several pieces. Not sure how many, but it self destructed. Changed all the seals.

Changed the L/U oil and changed the drain and screw seals down there too. There was no water in the oil.

Put on a new prop and then we took her out for a spin. She runs great with the exception that I may have to do a better job of syncronising the carbs. It isn't perfect yet. I thought I'd let him run a couple of tanks of gas through it then do a real link & sync then a decarb.

 

[Capt Ron]

Re: 93 evinrude waterpump

Sounds like you have the stiuation well under control...

"The impeller came out in several pieces. Not sure how many, but it self destructed."

Tip: when I see one like that I always try to account for all the pieces. That way I know that there isn't any pieces stuck in a water passage.

Thankfully no one in my family owns a boat, but then several friends do...