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fishinH2O
08-07-2006, 01:27 PM
On our way back in yesterday the 50 hp Johnson 1998 motor 2 stroke oil injected started knocking. It is coming from the lower unit. Any speculation as to what it might be? I want to get an idea so as what I might expect the repair shop will say.
frank n texas
08-07-2006, 02:00 PM
Back when you first got the boat did you drain, inspect and REPLACE the lower unit lube?

Did you drain any of the lube out yesterday and inspect it for color, smell, tiny metal particles/shavings and/or water in the lube?
frank n texas
08-07-2006, 02:21 PM
New lower unit...$1,490.00, plus core or add $200 for core that is trashed
and they cannot reuse...Plus labor and plus freight..:eek2:

Remanuf lower unit...$1,299.00, plus core or add $200 for core that is trashed and they cannot reuse...Plus labor and plus freight...:eek2:
Dipsay
08-07-2006, 02:34 PM
You sure it wasnt RC, potlicking ya from under the boat? Maybe he needed air!:roflmao:
frank n texas
08-07-2006, 02:37 PM
Or some mono line wrapped around and around and around the prop shaft?
FAT TIRE
08-07-2006, 08:33 PM
What RPM was the knocking at? Did it happen when coming off plane or at idle with a current behind you? If so this can be normal because of the end play or backlash in the gears. Drain the oil and check the magnetic plug for excessive shavings. If the oil is good and you can make the knock go away by applying a little throttle it is probably ok.
KILO
08-07-2006, 09:07 PM
We hadnt had a problem with it all day Fat Tire. When we were coming in we were on plane and about to take our cut into where we launch but a barge was in the way so we had to idle down, at that point we all heard the knocking. It did not seem to increase or decrease though at different speeds, it was the same knock and seemed to be the same timing in it at whatever speed we ran.
FAT TIRE
08-07-2006, 11:27 PM
Thats odd you would think a gear noise would increase or decrease with engine speed. Maybe the prop hub gave out?
fishinH2O
08-08-2006, 11:27 AM
The knocking dose increase but very minimal. It also seems to be coming from the lower part of the lower unit.
FAT TIRE
08-08-2006, 04:06 PM
BRP PARTS LIST (http://epc.brp.com/default.aspx?brands=ej&lang=E&dealerlocator=no) This site has a good parts break down and schematic view of the gearbox.
Beandaddy
08-08-2006, 05:00 PM
Pull the plug and drain the oil. If it is full of metal shavings then you have a real problem, if not you will have to start looking at something else. Pull the prop and look at the hub real close to see if there is anything behind it. Does it do it in reverse?
Beandaddy
Chongo
08-08-2006, 08:18 PM
Call Outboard Jack!!!!!!!!!!!!!!!!!
fishinH2O
08-09-2006, 10:02 AM
Pull the plug and drain the oil. If it is full of metal shavings then you have a real problem, if not you will have to start looking at something else. Pull the prop and look at the hub real close to see if there is anything behind it. Does it do it in reverse?
Beandaddy
OK will do! Did not try it in reverse. Thanks Beandaddy

Call Outboard Jack!!!!!!!!!!!!!!!!!

Yah I thought of that but he is so far away. There is a johnson motor guy who has a shop between Richwood & Angelton will try him. I will call Jack if he dose not work for me... Thanks.

Thanks for the link FAT TIRE that will be very usefull!
Muddskipper
08-09-2006, 11:49 AM
The more you run it the more damage you could be doing to the lower unit

Call Outboard Jack @

Stone and son Marine

713 686 1711

Tell him what its doing, and get his thoughts.

It might be something simple

He has one of the oldest shops in Houston and specializes in Johnson/ Evinrudes
fishinH2O
08-09-2006, 12:06 PM
Thanks Skipper. Will do... No not running her at all... Even push/pulled her up on the trailer.
GafftopDave
08-12-2006, 05:51 AM
Calvin's always took wonderful care of me....never cheap...but always honest.
Gigem
09-14-2006, 11:48 PM
Is it fixed yet?
grunt
09-15-2006, 06:26 AM
wouldnt be the dogs would it ?
as for a proper name i dunno. but if i recall right they are some niffty lil gears that allow for forward and reverse.
fishinH2O
09-15-2006, 11:21 AM
wouldnt be the dogs would it ?
as for a proper name i dunno. but if i recall right they are some niffty lil gears that allow for forward and reverse.
LMAO@grunt!

Just to let yall know the story. I know nothing about outboard motors & dont realy want to.:wink: Picked up a new part on Ebay that I thought would work... Wrong! My motor is Special! :doh: Well of course it is! :first: I ended up taking it in to Outboard Jack (My Hero!) at Stone & Son Marine. He had to totaly rebuild the lower unit & gave me a break in price & a new fule pump in trade for the Ebay part!

Picking up the Polar Express Today! Yahoo! Look out fishies! :merry: