1995 50 hp Evinrude triple questions

[ShoestringMariner]

After a tough summer of buying motors that turned out to be junk... I took another gamble today on a 1995 50 hp triple. I didn’t even know they made a three cylinder 50 horse.

in any case, this thing has a massive four blade prop on it. It says “turning point hustler”

13.25 x 17 by the looks of it.

I’ve got a 16 foot StarCraft super sport from the 70s. (Riveted aluminum)

can I assume that this is too much prop for that boat?

Anything else particular I should look for in special regards to these 50s?

Thanks

 

[racerone]

They marketed the same parts pieces as a 50 / 60 / 70 HP motor.----Could be the right prop.--------What inspection / testing have you done on it ?----You should at least install a new impeller.

 

[juno pierrat]

just a question ,1995 3 cylinder 50?

 

[racerone]

Why , yes they marketed the 3 cylinder 56 cube as a 50 HP for a number of years 1995 / 96 / 97 / 98 !!----Marketing department / try anything to generate sales / desperation / market share dis-appearing etc / etc.

 

[ShoestringMariner]

They marketed the same parts pieces as a 50 / 60 / 70 HP motor.----Could be the right prop.--------What inspection / testing have you done on it ?----You should at least install a new impeller.

Thanks. I picked it up on s fishing trip. The guy was a 2 man home based marine repair shop. I took his word that comp was 120 across all three. So I did visual only. Crankcase and cyl head never opened, wiring looked good. He said lower end service just done (new impeller, oil)

i verified oil when I got it home. Pulled plugs, I can hear impeller squeaking when I rotate the flywheel by hand, so assuming due to being new)
i haven’t confirmed compression yet as my gauge is on loan.

The only thing I don’t like is the flywheel has a few teeth with corners missing. Gear on starter or starter itself has been replaced.

any thoughts on these 50’s? (Be blunt if you don’t like them). Are they a smaller bore, stroke, defined by carb etc?

I snapped it up with the hopes it could be a good runner and get me out on bigger or more remote water with more confidence than I have with my 45 year old Merc.

 

[racerone]

??---A dry impeller will squeak , new or old !-----They are the SAME engine as the 60 / 70 HP models.---No difference in bore !---The engine stops in the same 3 positions usually.------And the cast iron flywheel suffers because of it.----A new flywheel is no longer available.---I have sold a few used ones already.----Have the exchange flywheels for possible repairs.----There is no reason to dislike the 50 HP model because they are the same as the 60 / 70 HP model !!

 

[ShoestringMariner]

??---A dry impeller will squeak , new or old !-----They are the SAME engine as the 60 / 70 HP models.---No difference in bore !---The engine stops in the same 3 positions usually.------And the cast iron flywheel suffers because of it.----A new flywheel is no longer available.---I have sold a few used ones already.----Have the exchange flywheels for possible repairs.----There is no reason to dislike the 50 HP model because they are the same as the 60 / 70 HP model !!

Ok good to know. I assumed an old impeller would be relaxed and quieter.

Will a 1989-90 70 hp flywheel work? I have a good one on a motor I intend to rebuild this winter

 

[racerone]

I suppose you could try it.----

 

[ShoestringMariner]

I suppose you could try it.----

I guess I could cross reference the part numbers and see if they’re the same.

Thanks again for your input. You’re always helpful

 

[racerone]

Different part numbers do not always indicate that a part is not the same / will not work !!------On more than one occasion have I had folks say ---" thank you very much for the parts you sent us -----Different part number but it worked just fine "

 

[ShoestringMariner]

Different part numbers do not always indicate that a part is not the same / will not work !!------On more than one occasion have I had folks say ---" thank you very much for the parts you sent us -----Different part number but it worked just fine "

Thats a good point. I’ve noticed that as parts become obsolete, there’s often a list of “replaced by” items that follow.

Would a visual and fit check be ok on a flywheel? Or could I risk timing issues that could be detrimental to this motor? (I.e. preignition etc)

EDIT; The 95 fly wheel is nowhere close to the 90 on Visual comparison. Looks like I’m on the hunt for a flywheel. I have to say that the 95 was nowhere close to being an improvement. The previous generations had a much more robust fly wheel and ring gear. I’m assuming this was a cost savings to OMC

 

[racerone]

Correct-------New does not always mean BETTER.--------Yes cost saving on a one piece flywheel.-----Possibly out sourced too.

 

[ShoestringMariner]

Eep, not seeing much out there on the ring gear appears lighter than the 60s/70s

would you happen to know if the three cylinder and two cylinder flywheels are the same?

 

[racerone]

The 1995 3 cylinder 50 / 60 / 70 HP flywheels are exactly the same.------??---And the magnet set up on a 2 cylinder flywheel is totally different.

 

[ShoestringMariner]

The 1995 3 cylinder 50 / 60 / 70 HP flywheels are exactly the same.------??---And the magnet set up on a 2 cylinder flywheel is totally different.

Oh duh me, of course it is!! What a dumb question...

I found used 60/70 FW’s on eBay that look the same but the ring gears look more substantial than the puny teeth on this one. Maybe that’s a bonus upgrade if the starter engages correctly

 

[racerone]

Go for it , nothing to loose but a few pennies if it does not work.

 

[ShoestringMariner]

So another question on this motor if I might; compression test aren’t all that wonderful. 110 105 110. Numbers are close together which I know is not bad but I was expecting 120 across the board as seller advertised.

I know, buyer beware. I took him on his word. I didn’t go with a compression gauge.

with my whining over with, I’d like to know if these numbers are really all that bad. I would call them fair but not good.

what I’m wondering is, because I’ve heard that these motors only read at about 120 at cranking anyway (because they build compression as they run). And if that is really is the case, are these numbers really that bad?

I’m trying to determine if this motor will run well enough to put on the boat for the remainder of this season.

 

[racerone]

Head gasket is cheap.------Remove head.-------Inspect cylinder walls for cross hatching.----If that is good and head gasket was good the motor will run just fine.

 

[flyingscott]

Leave it and start it and see how it runs no need to pull the head. Those motors will pull lower compression #s because of the decompression holes.

 

[ShoestringMariner]

And more questions...

I ran this motor on muffs today. Fired up but ran rough. Like it was a twin, not a triple.

Bottom plug is is cleaner than the others. Spark checking tool looked like a weaker spark than the uppers. How can I determine output? Plug wires and boots look healthy. Wrong spark plugs too.

the pee stream also looked intermittent, but otherwise a pretty strong flow.

i have a video of it running but I don’t know if I can post it