motor has hard time turning over

[sitimortlab]

i have a 100 hp evenrude about a 1974 id say. dont have the controals so i hooked up batry to it and jumped the starter with a screwdriver ..the motor starts to turn over well then slows down and bearly turns. took out plugs and it turns over easlybut has no spark .pulled flywheel and cleaned with steel wool still the same.

 

[OBJ]

Re: motor has hard time turning over

Richard, ya' need a good battery to turn these critters over. Something above 500cca with a good charge would do. Also, it is possible for the brushes to be bad and not making great contact with the commutator. Check all connections are clean and making good contact.<br /><br />Keep us posted.

 

[sitimortlab]

Re: motor has hard time turning over

i forgot to mention that i cant seem to shift it into neutral .no matter were i put the shift arm the prop stays engaged.

 

[OBJ]

Re: motor has hard time turning over

Rich...can ya' post the model number so we can get an acurate year? Thanks.

 

[rickdb1boat]

Re: motor has hard time turning over

Remove the shift cable connector at the motor. Try to shift it by hand at the motor and see if it goes into neutral, while someone turns the prop slowly. If so, you have a cable problem or control problem. That may be your whole problem if it won't come out of gear. It should not turn over at all if it's not in neutral. Let us know.

 

[Franki]

Re: motor has hard time turning over

Ok, <br /><br />This is one I can answer well.. <br /><br />I have the Johnson version of the same motor.. <br />(and I have thte rude one as a spare).<br /><br />Anyway, first the starter, OutboardJim is right.. you need a very decent battery for one of these babies..<br /><br />As to the gearbox and neutral.. chances are that you have a hydroelectric gearcase.. and those babies default to forward gear when there is no power. So without the motor driving the oil pump in the foot, and without positive running to one or both of the wires in the leg, there aint no way your gonna get that baby into neutral or reverse.<br /><br />Once you get it running, you should have no trouble getting it into neutral..<br /><br />If you do, you'll have to check the electrics.. (there are two wires running down into the leg if your model is a hydrolectric..)<br /><br />rgds<br /><br />franki

 

[OBJ]

Re: motor has hard time turning over

You are right about the electric shifts defaulting to forward Franki. But if it's a 74 like Rich says, then it's a manual shift. OMC stopped making the electrics in 71'. That's the reason I asked for a model number so we would know the exact year. May be electric, maynot. Will have to wait for Rich to post.

 

[sitimortlab]

Re: motor has hard time turning over

i found some no. on the motor they may be the model 100293r and jo8870 . i have no controal cables with this motor.i have ben jumping the starter silinoid to try and get this motor running.i will try and hook up a more powerful power supply.

 

[Dhadley]

Re: motor has hard time turning over

That's a 1972 and it is a hydro-electric shift. <br /><br />Good luck!

 

[OBJ]

Re: motor has hard time turning over

Whoops!!! My mistake....they stopped the electrics in 72'. Thanks Dhadley. Sorry Rich.

 

[WillyBWright]

Re: motor has hard time turning over

Are you jumping between the large posts on the solenoids? I wouldn't expect that you'd get a good enough connection that way. (And you'd need two screwdrivers...which you would have mentioned. So ignore me.)

 

[papasage]

Re: motor has hard time turning over

i have a 1972 shop manul it showes a eletric shift .

 

[Dhadley]

Re: motor has hard time turning over

Its a hydro-electric. Way different than a straight electric shift.

 

[sitimortlab]

Re: motor has hard time turning over

i now have hooked up a good battery and am jumping past the siloniod directly to the starter and it turns over fine now.but has no spark and the prop turns as i crank it.

 

[Dhadley]

Re: motor has hard time turning over

You will have to follow the ignition testing proceedure in your service manual. Make sure you use the manual for the 1972 motor. The ignition is completely different than a 74.<br /><br />With no power to either wire going to the lower unit the motor will be in forward. So at this point the lower is acting correctly.<br /><br />Good luck!

 

[Franki]

Re: motor has hard time turning over

You say you don't have the controls hooked up..<br /><br />That would be the first thing I'd investigate with regards to the lack of spark.. also since this is a hydroelectric, even if the shifter wasn't powered by an oil pump in the foot, you wouldn't get it out of gear because your control box is missing.. which includes the 3 power buttons (forward, neutral and reverse) and wiring for them.<br /><br />Shame your not in WA.. I have my spare evinrude controller sitting out the back.. but there are a ton of these motors around, so you should be able to find one easily.<br /><br />As for the ignition, its a 72 model, which means you can't even do the car coil conversion.. (no points) if it was an older model you could...<br /><br />no matter, be very careful what you mess with electically wise.. if you blow the powerpack on that thing, it will cost you. (cost me 350 bucks AUD). First thing I did when I got mine, was to fix all the earth (neg) wires to the motor.. all of them were looking sad.. and a downed earth strap can fry your pack.<br /><br />Find a replacement controller first.. so your not working in the dark.. any controller from 85+ HP from that time period would be fine.. (even if its a johnson controller).<br /><br />By good battery, we mean a 550 CCA battery.. I discovered recently that my new 260 CCA model is not good enough to start it more then once or twice. (no good for fishing.) if I was to turn the motor over on this 260 CCA battery while stopping it from starting somehow, it would spin for about 20 seconds max before the battery couldn't turn it at speed anymore..<br /><br />regards<br /><br />Franki

 

[Dhadley]

Re: motor has hard time turning over

Franki brings up a good point. I realize you dont have the controls hooked up but I assumed you had a jumper wire to simulate the key in the "On" position to give the ignition the initial 12 volts. If not, you wont have spark but there may not be anything wrong with the components. This is a battery CD not a magneto CD ignition.<br /><br />Anyway, lets get set of controls hooked up and go from there. That way you can go by the book. <br /><br />My fault for assuming, sorry!

 

[Franki]

Re: motor has hard time turning over

Dhadley..<br /><br />Now thats interesting.. what is the difference between battery capacitor discharge and magneto capacitor discharge ignitions???<br /><br />rgds<br /><br />Franki

 

[Dhadley]

Re: motor has hard time turning over

The battery CD relies on the battery for the initial voltage and the magneto doesnt.