Help!-1965 Evenrude 90hp

[Marshall]

I have a 1965 Evenrude 90 hp, Starflight 90, model 90593-c, serial no E01105, that ran great last season, and I'm trying to get it ready now for the summer..the prob is that the starter gear was fried the last time i tried to use it last summer, and it was replaced with a new starter. I have tried everything I know how, checking connections, taking out and testing starter, but the problem is that it turns the flywheel very slowly, not enough to give spark, similiar to an engine in a car starting at -20 degrees. If I continue to crank it, I will burn it up. Have a new battery, everything looks fine. I did bring it down from Mich to Mississippi last month, and perhaps something inside became jolted because of the ride? Someone told me once that there are needles inside the engine that have to be right on???? Had no idea what they were talking about. All the cylenders are in top shape, compression is good from what I can tell. I may have dropped a nut into the lower unit while working on it, but I dont think that would cause problems. Taking the lower unit off is a pain, never did that before, so Im afraid to try anything else unless I know what Im doing..Anyone have any ideas as to what to try next before i have to take it to a mechanic? any help from anyone would be greatly appreciated......thanks!!

 

[jfm]

Re: Help!-1965 Evinrude 90hp

Is the engine partially seized? I mean, can you turn it over by simply turning the flywheel with your hand? This will be difficult on a compression stroke but on a V4 like this there should be places where the flywheel turns quite freely? If it does turn freely, there is something wrong with your starter motor or electrical supply to it. And you should be able to start it with the emergency rope (I cant remember if the V4s had an emergency rope, and little hooks in the flywheel to jam the knot into? I think they did) Otherwise, if it is stiff, something has jammed/seized in the engine or gear box. Strip down job. You can eliminate the effect of the gearbox by selecting neutral when starting the engine

I'd be very worried about that dropped nut in the lower unit if you were inside the gearbox, otherwise it will be ok

Needles are the needle roller bearings for the crank and big/little ends. They should be fine, they do not jam, there's nothing to adjust and they should be as right on as they were in 1965, unless the engine has run 50hours a week since then

 

[Col]

Re: Help!-1965 Evinrude 90hp

Agree with JFM, but would add, try turning engine by hand with spark plugs out. If it turns easy, you have starter/electrical probs. So recheck all electric connections.

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[Marshall]

Re: Help!-1965 Evinrude 90hp

It doesnt seem like the engine is partially seized. with the plugs out, the engine turns like a champ. The dealer to whom I orrigionally got the starter from gave me some tips, like disconnecting the alternater wires, the 2 yellow ones, but that was no help. Everything else looks fine. This engine is all electric, and does not have a pull start. All controls are electric also. Its a one of a kind I think, The boat is also Evinrude as is the trailer. Ther person I bought it from 2 years ago just had it rebuilt a year earlier. It ran great all last year until the starter gear stripped out because of the mounting screw comming loose. The bendix operates fine, like it should also. Will try cleaning the terminals again, on all connections. I am sure it is not an internal problem: otherwise the flywheel would have frozen. Any more suggestions? This is a one of a kind boat, and I have spent alot of time restoring it to almost new condition. I understand taht parts are hard to come by, but what else is new? lol...Thanks for your help.

 

[Col]

Re: Help!-1965 Evinrude 90hp

Definately elec probs. Make sure your (new) battery isn't duff, try your cars battery.
Recheck contacts. let us know what you find.

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