Reply
 
Thread Tools Search this Thread
 
Old 10 July 2006, 17:32   #1
Member
 
Country: UK - England
Boat name: Seashell
Make: Redbay
Length: 7m +
Engine: Inboard diesel
Join Date: Jan 2004
Posts: 5,263
Teenage mechanic needs help with old engine!

Im currently getting angrey with this Evinrude 50/60 what ever it is Ive aquired. I want to get it going, but it won't start. As we have established I don't *do* engines so this is probably going to end in tears.
Anyway, its a 1986 50hp Evinrude 2 stroke. It turns over, but there is no spark. Can anyone help....
__________________

__________________
Tim M is offline   Reply With Quote
Old 10 July 2006, 17:53   #2
RIBnet admin team
 
Nos4r2's Avatar
 
Country: UK - England
Town: The wilds of Wiltshire
Boat name: WhiteNoise/Dominator
Make: Ballistic 7.8/SR5.4
Length: 7m +
Engine: Opti 225/Yam 85
MMSI: 235090687/235055163
Join Date: Jul 2005
Posts: 12,645
RIBase
Tim you should have some wires coming out from under the flywheel to the coils/switchbox/points or whatever. These are the only ones you need connected to make it spark. Anything going to the control box will be the wire that stops the engine, power trim/tilt if it's got it and electric start.

Personally (and it's hard making the call when I can't see the engine) I'd disconnect everything from the engine that goes to the remotes apart from the 4 wires going to the starter solenoid (2 thick 2 thin) and then check the spark.

Be aware that if you manage to start it like this then you're going to have to cut the fuel or pull the spark plugs off to stop it.

If this doesn't work, test the coils with an ohm-meter and test the spark generating coil under the flywheel the same way. The coils should return similar readings and be very low resistance between the input wire and the negative. The spark generating coil (the wires come out from under the flywheel) should show nearly 0 resistance between the wires coming out but there should be no reading (open circuit-infinite resistance) between the wires and the body of the motor.

If all that checks out then take it to a marine tech to get the ignition box checked over.
__________________
Need spares,consoles,consumables,hire,training or even a new boat?

Please click HERE and HERE and support our Trade Members.

Join up as a Trade member or Supporter HERE
Nos4r2 is offline   Reply With Quote
Old 10 July 2006, 17:57   #3
Member
 
Country: UK - England
Boat name: Seashell
Make: Redbay
Length: 7m +
Engine: Inboard diesel
Join Date: Jan 2004
Posts: 5,263
Thanks Nos; Ill check those things out tomrorow.

The engine is already disconnected from the remotes (reason I wanted to know which wire was which was so I could turn her over by crossing the wires over. Should be able to stop it in the same way)
__________________
Tim M is offline   Reply With Quote
Old 10 July 2006, 18:01   #4
RIBnet admin team
 
Nos4r2's Avatar
 
Country: UK - England
Town: The wilds of Wiltshire
Boat name: WhiteNoise/Dominator
Make: Ballistic 7.8/SR5.4
Length: 7m +
Engine: Opti 225/Yam 85
MMSI: 235090687/235055163
Join Date: Jul 2005
Posts: 12,645
RIBase
it probably won't stop the same way- the usual method of stopping a 2-stroke is to short the feed to the coils/ignition or the like. It might be that crossing the wires like that is what's stopping it from running. Of course, your engine might have a different setup on it.

you could try unplugging all the wires to anywhere apart from the ignition system and rope starting it. Be aware it won't do your charging circuit much good if it's run like that though so at most use this method to spark test it.
__________________
Need spares,consoles,consumables,hire,training or even a new boat?

Please click HERE and HERE and support our Trade Members.

Join up as a Trade member or Supporter HERE
Nos4r2 is offline   Reply With Quote
Old 10 July 2006, 18:12   #5
Member
 
Country: UK - England
Boat name: Seashell
Make: Redbay
Length: 7m +
Engine: Inboard diesel
Join Date: Jan 2004
Posts: 5,263
A photo of under the flywheel:
Attached Thumbnails
Click image for larger version

Name:	DSC01012.JPG
Views:	150
Size:	112.7 KB
ID:	20835  
__________________
Tim M is offline   Reply With Quote
Old 10 July 2006, 18:17   #6
RIBnet admin team
 
Nos4r2's Avatar
 
Country: UK - England
Town: The wilds of Wiltshire
Boat name: WhiteNoise/Dominator
Make: Ballistic 7.8/SR5.4
Length: 7m +
Engine: Opti 225/Yam 85
MMSI: 235090687/235055163
Join Date: Jul 2005
Posts: 12,645
RIBase
if it's any use i'd guess that:-

10 o'clok is electronic ignition trigger.

12-1 o'clock is ignition power generator coil

The other 2 with yellow wires are charging circuit.


I may well be wrong though as I can't really see enough. The best thing you can do is to buy a manual!
__________________
Need spares,consoles,consumables,hire,training or even a new boat?

Please click HERE and HERE and support our Trade Members.

Join up as a Trade member or Supporter HERE
Nos4r2 is offline   Reply With Quote
Old 11 July 2006, 06:50   #7
Member
 
Country: USA
Town: boston
Boat name: Miss bad 61
Make: Crapko, AKA Mako
Length: 5m +
Engine: OMC Mod50
Join Date: Apr 2006
Posts: 398
do a compression test, to see if she is worth the time, check the serial no.,
on them twins 50hp-60hp, the ones with the best ports end in 100,.
make sure you hook up a kill switch if you try to start it up. if you try to kill it by tuchin wires the coils will zap ya.

you have no spark at all?
__________________
fast fred is offline   Reply With Quote
Old 11 July 2006, 15:19   #8
Member
 
Country: UK - England
Town: paignton
Boat name: rebel
Make: ribtec535
Length: 5m +
Engine: 90hp yamaha
Join Date: Jul 2006
Posts: 35
try new plugs and check the gaps could be out!!! if you already havent done is
__________________

__________________
djbk is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off





Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 18:08.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.