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Old 05-27-2012, 10:09 PM   #1 (permalink)
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1993 safari 377 "vs" 503

I just puchased 2 1993 safari's, one a 377, the other a 503.
both are in about the same condition(in need of some TLC)
but the 377 has a NEW long-track conversion. the 503 a short track.
im looking for imput on wich one to keep and work on.
ive heard that there both poorly enginered, but hey their Rotax's so i should get some use out of them.
keep as is and repair?
engine swap and new gaskets?
eliminate oil injection?
etc...?
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Old 05-27-2012, 10:23 PM   #2 (permalink)
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well id think the 503 would turn the long
track easier, but bet they would be good
leaving them as is.
pritty much up to you???
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Old 05-28-2012, 06:47 PM   #3 (permalink)
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Put the 503 into the long track. Direct swap.
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Old 06-03-2012, 11:56 AM   #4 (permalink)
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Thanks guys, i'm going to swap the 503 into the long track after new pistons and rings(might as well while i have it out) keep the oil injection and wait for snow to try it out.
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Old 06-03-2012, 03:13 PM   #5 (permalink)
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Sounds like a plan!
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Old 06-09-2012, 06:54 PM   #6 (permalink)
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So got new pistons -rings -crank seals-all gaskets etc, installed.
Just working on re-install/503-377 swap.
Just as a side note* a fair bit of cutting-grinding-re-welding is required for all the exaughst bracketry! the 377 vs 503 pipes are totally different and mount to factory "welded to engine compartment walls" support system.
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Old 06-15-2012, 12:38 PM   #7 (permalink)
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The 377 is not a bad motor in a short track at all. My first sled was an 89 safari scout with a 377 pulled me up to about 60mph of course I was only a kid about 90lbs at the time. I would invest the time in to fixing up both of them.
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Old 06-15-2012, 07:07 PM   #8 (permalink)
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I Have had a 89 safari scout 377E AND an 89 safari Voyager and Stratus 503 and I had nothing but trouble with the 377 def not a fan of those things, had it rebuilt at skidoo because I never had the ambition to do it myself back then and it was hard to start in cold weather, was groggy after sincing the carb properly was bad on gas and they most certianly do not go 60mph they will do about 50 in a straight line

Go with the 503 they are great motors, lots of bottom & top end to them, fair on gas and will pull an ice hut easy. great sleds.

Just my thoughts..
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Old 06-15-2012, 09:37 PM   #9 (permalink)
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I totally agree with Gsxr, i currently have 2 1988 safari 377 short trck that take me just about anywhere and quite fast. they just lack in deep powder. But with the weight of the 1993 vs much smaller 1988, I think i'll stick to just the 503 and pass on to a flat land rider the 377.
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Old 06-15-2012, 09:47 PM   #10 (permalink)
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while i am not of fan of the 377"E"(more crap and wireing to deal with and can go wrong), i feel bad that yours was a disapointment.
i have 377's from 1978 and up and have found them wonderfull little motors, if maintained and treated as a pony, not a clydsdale, they have given me years of good performance. If the oportunity arrises in the future, you(1979 skidoo 399) should give one a second chance, as a hobby or for the kids. also parts and re-builds are cheep, and if your into older sleds they are virtually the same motor through the ages.
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Old 06-15-2012, 09:52 PM   #11 (permalink)
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The 377 safari was my very first sled and I will admit when it was working it was a bundle of fun, not only did it get me into mechanics and teach me a world that I had never seen but it also got me into power sports and I have owned about 10 sleds through out my life and I am only 19.... I have also learned that there is no feeling like snowmobiling, espically in the deep powder and the feeling of the back droping when you punch it going straight up a hill. over all though I prefer the 600's now just because they are still light enough to whip around trails but there fast, realiable and just that much more fun. Nothing beats 185 Kph on the lake!
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Old 06-15-2012, 09:53 PM   #12 (permalink)
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at some point however I may give the 377 one last try, but not anytime soon I already have 3 sleds!
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Old 06-15-2012, 11:33 PM   #13 (permalink)
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Our family ran the 380's for many years even before I was born. My first sled was a 95 Formula with the 380 and then we got the 06 MXZ 380. They are very good engines, and in the older, more rudimentary chassis designs- it did very well. You weren't going to be going 45 into a corner with a sled that has a 36" ski stance... So the 380s did fairly well for a long time (proof in the fact that they made it for 30 some odd years).

Now with the improved tech, the 380 was far out classed by the rev chassis (my dad even agreed, and that's saying something). So then we picked up the XP 600. And to be honest, the XP chassis even out classes the 600's. IMO, to get the same level of fun (fear) out of an XP you need the 8 hundo.

And yea, our 380's would do about 60-63 on speedo. So like 56-58 in reality.
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Old 07-22-2012, 12:12 PM   #14 (permalink)
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so i got the 503 wedged in, it takes up allot more room than the 377.my problem now is that the 503 exaughst at its highest point, for about 6" touches the underside of the hood foam. i will have to trim back the foam, but do any of you know how much clearence from the pipe to the plastic would be a safe amount, to avoid melting?
does any one have a heat insulating tip or device?
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Old 07-22-2012, 12:38 PM   #15 (permalink)
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an easy way would be to mark out where the exaust is closest to the hood and then use an angle grinder and cut away a section of the hood to expose the exaust to cold air, or you can build a set of custom hinges and raise the hood up a little higher to give some more clearence, i have never had to work around a problem like this but that is what I would do.
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Old 07-22-2012, 02:20 PM   #16 (permalink)
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The 377 will run forever. I can vouch for that. If your not looking for speed then go with the 377. Its a work horse. Its surprizingly powerfull..... not quite the power of the 503 but will far outlast it.
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Old 12-28-2012, 11:19 AM   #17 (permalink)
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so i finaly got the 503 longtrack out for a test run, lots of power and quite fast, starts great.
HOWEVER, im wondering if i have clutch problems, she idles real nice, but when i start throtteling up it starts to whine, real high pitched, almost unbearably so. and when going from full throttle to easing off its accompanied with the occasional clunk.
I was hoping to get some imput, or if i pull the clutch, what should i look for?
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Old 12-28-2012, 02:20 PM   #18 (permalink)
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Well, the 503 is an axial fan engine.
Check the fan bearings, they can get dry and fail.
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Old 12-28-2012, 06:21 PM   #19 (permalink)
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My buddys wife has a 503 fan and she has put almost 13,000 miles on it never had a rebuild and its ready to go for another season.
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Old 12-29-2012, 03:42 PM   #20 (permalink)
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this motor only has about 4000 kms on it, but since i had it out to swap into the long track, i figured id give it a bit of a rebuild.
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