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my 1989 evinrude 90hp wont crank

aggiestckl

aggiestckl

New member
So as some may know im a new checkmate owner, 2nd boat, limited knowledge to outboards.. Well I took the battery I had from an old truck and clamped the battery wires to it to start the motor, before it started their was like a buzzar sound, it started up fine, ran fine.. Shut it off.. A day or so later did it again and the starter was spinning, but wasnt really engaging.. Ok. so I go out change the key switch since the screwdriver key wasnt going to work all summer.. Come back out, and their is no power getting to the motor what so ever now. Checked switch connections they are all correct.. Im thinking what happened is the terminals not being connected the best way and the sparks from clamping and unclamping the terminals shorted a fuse.. Now heres the thing, I only see two fuses in the back.. They are square with 5 prongs.. Are these two 12v 40a fuses the only ones that would hold it up? Is their any other fuses in the motor I dont know of? Any other ideas? Note im positive the wires are correct on the key switch, went through it for 40 mins, its correct
 
Take a look at the top of the block on the side where your red harness plugs in. You'll see an in-line fuse holder wrapped together with the harness for the powerpack and ignition on that side. Pull it apart ( gently) and there will be a glass in-line automotive style fuse in there. It's I think only a few amps and I'll bet it's blown. Just replace it and you should be in business.
 
Groucho is right Aggie. The fuse connector on your engine will be a "red" in-line style and it usually has a stainless steel "wire style" hoop around it to keep the two halves from seperating from vibration. It holds a 20 amp fuse.
The two "square 5 prong things" you were mentioned are the trim relays.....one for "up" and one for "down". They are probably on the back of the engine mounted to the exhaust plate, or on the top between the two cylinder banks behind the powerpack. Just FYI, I've seen loose ground straps on the engine cause low cranking voltage too. Make sure you check all the grounds on the engine. Hope that helps!
 
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