Logo
FULL SITE MENU

1995 50 hp evinrude need help please no power

S

southla

New member
i have a 95 50hp evinrude with a fresh rebuild my problem is it doesnt have any power to get up on a wave like its not turing up enough rpms carb were cleaned out has plenty spark im stumbled and dont know what it can be ?
 
Last edited:
Re: 50 evinrude need help please no power

I would start with a compression test, then make sure the carbs are linked/synched correctly. Make sure the advane linkage is connected correctly.
 
Re: 50 evinrude need help please no power

Sometimes when motors are " rebuilt " the original cause of the failure is not corrected.-----------Who rebuilt this motor and who rebuilt / cleaned the carburetors??
 
Re: 50 evinrude need help please no power

Me and a friend rebuilt the block Had a piston with a hole in it bored the block 20 over and got 2 new pistons in it and the carbs done by a local outboard mechanic the last time I had ran it with the burnt piston it ran about the same as it is now Just a little better now
 
Re: 50 evinrude need help please no power

Verify that the carburetors are in fact clean.---------------Verify timing and timing advance are correct.-------------------Do not run this motor without checking for proper fuel / oil delivery.------------Running on premix or trusting your VRO unit???
 
Re: 50 evinrude need help please no power

Did you determine the cause of the failure during the repair process ??-----------Confirmed operation of overheat senser???------Replaced waterpump impeller ???
 
Re: 50 evinrude need help please no power

Sensor is functional mechanic tested it no vro on this motor running double oil don't know what caused the failure Water pump was changed as for the timing that may be the problem I don't know how to check or verify it
 
Re: 50 evinrude need help please no power

If it has the small regular fuel pump, than check for a ruptured diaphragm.----------------Have you checked for proper installation of the flywheel, sheared flywheel key ( timing )---------------------Is the timer base under the flywheel rotating properly.---------Both carburetors opening up at full throttle???
 
Re: 50 evinrude need help please no power

Compression gauges are cheap, purchase one, remove all spark plugs, take a compression reading. What are the readings per cylinder?

Spark... The plenty of spark statement doesn't do it. THe spark on that model, with all spark plugs removed, must jump a 7/16" gap with a strong blue lightning like flame.... a real SNAP! Using the spark plugs to check the spark is a waste of time. A spark tester can be purchased in various automotive part stores, or you can build the following one easily.

(Spark Tester - Home Made)
(J. Reeves)

A spark tester can be made with a piece of 1x4 or 1x6, drive a few finishing nails through it, then bend the pointed ends at a right angle. You can then adjust the gap by simply twisting the nail(s). Solder a spark plug wire to one which you can connect to the spark plug boots, and a ground wire of some kind to the other to connect to the powerhead somewhere. Use small alligator clips on the other end of the wires to connect to ground and to the spark plug connector that exists inside of the rubber plug boot.
Using the above, one could easily build a spark tester whereas they could connect 2, 4, 6, or 8 cylinders all at one time. The ground nail being straight up, the others being bent, aimed at the ground nail. A typical 4 cylinder tester follows:
　
..........X1..........X2
.................X..(grd)
..........X3..........X4

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

Synchronization.... Remove the carburetor face plate, engine NOT running but in forward gear, apply full throttle and check to see if both carburetor throttle butterflies are fully open (horizontal). Close throttle, then check to see that both butterflies are actually closed, and that they open and close at the same time. Make sure that the throttle butterflies just start to open when the scribe mark on the cam is dead center with the throttle cam roller.... not before or after.

The idle timing is something that you will need to look up in your manual as I don't know exactly what that setting is for your engine. It pertains to a certain timing degree setting when the cam scribe mark is dead center with the roller. Also, look up what the full spark advance timing setting is supposed to be and let us know what those two settings are.

Let us know what you find (Compression, spark, carb butterflies, cam to sam roller mark).
 
Re: 50 evinrude need help please no power

I will check that diaphragm I checked the carbs the are both fully opening The key isn't sheared but I will check it n the flywheel I will check it all out when I get a chance
 
Last edited:
Back
Top