NGC Quick Johnson outboard Question NGC

[fotoguzzi]

I am the care taker of a Cabin owned by our friends the Rockwood's..

I did the Art..
I launch and pull out the pontoon every year..

If nice I let Finn drive it..

it has a 2002 25hp that has lived outside it's entire life.. from 20 below zero F to near 100*..

one of the other users reported a problem with the motor.. when I got there it started right up but was not peeing cooling water..
I fished out the hose with weed whip line but that was fine, then saw the fitting out the engine block was melted..

so I guess the impeller pump is shot.. I think I can replace it right at the dock?

I've never done any outboard work, my Dad always did that when I wrecked the boats/snowmobiles/mini bikes..

accept for not getting a pontoon ride we had a great time this week at the cabin..


my question, finally... when I go back up and then down the 100 steps to the dock.. should I bring metric or SAE wrenches?

[oldbike54]

 Considering it is 100 steps down to the boat , seems taking both might be wise .

 Dusty

[Guzzistajohn]

I love it when you can say..............NI CE JOHNSON

[guzzitime]

 :Don't forget to grease the splines that fit into the base of the engine. Do replace the impeller and the housing. Change the oil in the foot and you should be ok. A Johnson is an Evinrude with a different paint job.

[fotoguzzi]

. A Johnson is an Evinrude with a different paint job.

got to love Milwaukee!  in 2000 bought out by Bombardier Recreational Products but I think mine still made in Wisconsin?

[sidecarnutz]

I changed one of these for a friend some years back. Procedure can be looked up on the web. There is ONE fastener on that lower, you don't want to remove! Procedure will specify it. You'll be doing a lot more disassembly if that one gets pulled. Otherwise it is a straightforward thing to replace. Good too have the lower raised so you can work on it and you'll be dropping its gear oil too if I recall correctly. That fitting probably deformed from heat. These compressible impeller pumps will move some water right up until the last vane cracks off.

[fotoguzzi]

Thanks, does anyone think the motor was harmed if over heated? it does start right up and sounds OK..

[wrbix]

I love it when you can say..............NI CE JOHNSON

QUICK JOHNSON .......... not so much.

[Lannis]

Good thing it's not a BIG JOHNSON.    Why is this guy smiling, though ....



Lannis

[boatdetective]

If the actual fitting for the drain is melted (I can't tell from the photo), then the motor got hot. Are you SURE it is melted?

You don't want to maintain outboards with the attitude of "well, I've got six vanes on the WP impeller- so I can afford to lose a few." 

Look at the cylinder head. there should be a bolted cap that really is just the top cover for the water jacket. At the tippy top there's the thermostat. If the motor cooked, the plastic components at the top of the block/head will get super hot and melt to the case. look at wires and hoses up on the top end and move them around- did any weld themselves to the case? Is the paint discolored and/or flat rather than shiny? If you can pull the T-stat, do so. It should be wet in there. If it is dry and gasket is bubbling- you know something bad went on.

Compression tests are easy and can tell you a lot.  A severe loss of compression could suggest scuffing in the cylinders or detonation. If the cylinders got toasty, there's a chance that there is scuffing on the exhaust port side of the cylinders. If you have a tiny light, pull a plug and look in the hole. The piston crown should be black and covered with carbon. If it is shiny or at all textured- that's  a bad thing. If you are lucky, you can see the walls of the cylinder to see if they are shiny and wet with lube oil.

If you pull the water pump and find that you have in fact lost vanes- you must find them all. They will NOT flush through the head.

Have fun!

JKK

[LaMojo]

Looks like the plastic nipple has been deformed by a pulling of the hose sideways for a number of years.  Not melted.  Looks like the tension finally broke the fitting at the threads. I'd install a new fitting , a new thermostat and check the water intake screen to make sure it is not clogged with trash and test again before I would pull the pump.

[fotoguzzi]

thanks BoatD.. not the best pic but here's top of motor.. it's 150 miles away so can't inspect till at least next weekend.

[boatdetective]

Look at the wire sheath at 6:00 (right under the plug for the harness).  It is melted where it touched the block. Ladies and gentlemen, we have a winner!  The thermostat is at 6:00 at the bottom of the pic, under the bump out in the casting

[fotoguzzi]

I did see that.. it was the outer insulation but the wires inside looked not melted..
does this motor shut itself down if over heated?
Like I said, I was not there when this happened.. if it starts up are the wires still good?
I will bring my boroscope to look inside at the piston when I get back there..

[boatdetective]

The point of the sheathing is not the wires- it's a sign that the block got smokin hot.  Do a compression test an look at the cylinder walls. They should be wet.