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95 Evinrude 50HP

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Brian Scott

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I have a 95 Evinrude 50 HP outboard. It has worked great until a few days ago. I have noticed that when I try to start it the engine makes a shrill squealing sound. It almost sounds like the flywheel is dragging against something. I can turn it off and try again and it may start up and not do it again. I have also noticed a drop in power the last time I put the boat in the water. It took way longer than normal to plane the boat out at wide open throttle. I am a new boat owner and do not know much about outboard motors. I am mechanically inclined and with a little guidance I think I could repair this myself if someone could just point me in the right direction and if it won't be too much trouble to tackle.
 
It's possible that the bendix gear is not being released from the flywheel... check it.

Make sure that it is not pressed too tightly into the flywheel teeth... when engaged, you should still be able to rock the gear ever so slightly back and forth.

Also, if the gear has been greased, that would collect dirt! If it feels tight on the shaft, spray it with a little WD-40.
 
It worked fine the first few times I took the boat out. Is it possible the starter could have moved slightly to cause this problem? Also, when you mention spraying with WD40, did you mean spray the starter bendix, flywheel or both? Can I put some grease on the flywheel without causing a problem?
 
For the drop in power you start with a compression test.-------------Is the oil injection in service and working properly ?----------Has the waterpump been maintained ?-----------Has gear oil in the lower unit been looked at or changed recently ?
 
DO NOT put grease anywhere!

Apply the WD40 only to the shaft upon which the gear rotates. This washes awat impurities (dirt etc)
 
I bought the boat from a friend who had just finished having the engine completely gone through. The person who redone the engine fixed the oiler so that you now mix the oil with the gas at 40:1. The water pump was new and the lower unit had also been reoiled as well. Sometimes it works great and others it seems to take a little bit for it to come to full power. I will recheck the oil in the lower unit and change the gear oil to see if that helps.
 
If you're using pre-mix fuel (mixing the oil with the gasoline), the mixture is 50/1, not 40/1. THat 50/1 mixture would be one pint of good quality 50/1 oil mixed with 6 gallons of gasoline. A gasoline octane rating of 87 is fine.

Check to make sure the VRO was switched out properly as follows:

(VRO Pump Conversion To Straight Fuel Pump)
(J. Reeves)

You can convert the VRO pump into a straight fuel pump, eliminating the oil tank and VRO pump warning system, but retain the overheat warning setup (and fuel restriction warning if so equipped) by doing the following:

1 - Cut and plug the oil line at the engine so that the oil side of the VRO pump will not draw air into its system. Trace the wires from the back of the VRO to its rubber plug (electrical plug) and disconnect it.

2 - Trace the two wires from the oil tank to the engine, disconnect those two wires, then remove them and the oil tank.

3 - Mix the 50/1 oil in the proper amount with whatever quantity fuel you have. Disconnect the fuel line at the engine. Pump the fuel primer bulb until fuel exits that hose with the tint of whatever oil you used. Reconnect the fuel hose.

That's it. If you want to test the heat warning system to ease your mind, have the key in the on position, then ground out the tan heat sensor wire that you'll find protruding from the cylinder head. The warning horn should sound off.

Thousands of parts in my remaining stock. Not able to list them all. Let me know what you need and I'll look it up for you. Visit my eBay auction at:

http://shop.ebay.com/Joe_OMC32/m.html?_dmd=1&_ipg=50&_sop=12&_rdc=1
 
Joe, all that has been done already. It is just like you described above, I double checked. I will immediately begin mixing the oil at 50:1 like you said. I only have a 10 gallon tank and it seems like the engine is using a considerable amount of gas. I know boats aren't the best on gas mileage but I figured I should be able to run more than 5 or 6 miles without using up over half a tank. ( I guess). The gas gauge doesn't work accurately. I have not noticed any leaks anywhere, gas, oil or otherwise. Once the rain stops here I will check the starter bendix and spray it to see if that helps. My boat stays outside but is always covered so I don't have to worry about water getting into the engine or fuel.
 
Gas usage depends on the boat/hp/prop combination. However, on a 50hp on a normal size boat for that type engine, 5 or 6 gallons of fuel should last at full throttle about a hour, perhaps more... and at crusing range (full throttle then back off to about 3/4 throttle) almost double that time.

Someone with the same engine will probably jump in here and pinpoint the fuel usage to time ratio.
 
I have a ten gallon tank but the boat didn't run continuously for an hour. The travel time I made between fishing spots was maybe 30 -45 mins. What items could I check to see if I can improve the mileage a little? I'm still waiting on the rain to clear out before I can spray the starter bendix.
 
Found starter problem. The bendix return spring was broken. Ordered a new one but haven't picked it up yet. Need to know what the best way is to get the retaining ring off the end of the shaft so I can replace the parts? Can I cut it off easily with a pair of side cutters? What about putting the new retaining ring back on? Will it be open enough so I can place it into the slot and close it up with pliers? Or, do I have to force it over the end of the shaft with something? If it has to be forced over the shaft what is the best tool to use for this?
 
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