Polaris Tech Question....SLT780

External Since: Jul 17, 2003 Posts: 1

OK, I just installed an SBT motor in my 96 Polaris. While breaking it
in, I noticed increased vibration, mainly while trolling through no-wake
zones.

There is no excess vibration at idle or at speed, just while trolling at
around 5 mph. The vibration is fairly significant at this speed, so
naturally I am concerned.

I did the alignment when installing the new motor by moving the motor
around to the same wear marks the original motor had created (this is
what my Polaris dealer said to do, because it is all they ever do when
installing a new motor.) The drive shaft went in pretty smoothly,
although it is kind of hard to tell from the back of the craft.

Is this vibration an alignment issue? Motor balancing issue? Something
to be very concerned with or just a little concerned with?

Now that the motor is installed with manifolds, etc., I do not have
access to the mounting bolts.

Thanks for you replies!!!

External Since: Jul 01, 2003 Posts: 104

You might be a little rich on the carbs plus you probably have extra oil
for break in? Most of the Polaris triples have a little rattle down low
but excessive rattle should be fixed. Since you had a previous engine
that didn't shake as much, I would suspect something is wrong with
either the alignment or carb tuning. Might want to give it some time to
break in and see if it gets better?

Jamie wrote:
> OK, I just installed an SBT motor in my 96 Polaris. While breaking it
> in, I noticed increased vibration, mainly while trolling through no-wake
> zones.
>
> There is no excess vibration at idle or at speed, just while trolling at
> around 5 mph. The vibration is fairly significant at this speed, so
> naturally I am concerned.
>
> I did the alignment when installing the new motor by moving the motor
> around to the same wear marks the original motor had created (this is
> what my Polaris dealer said to do, because it is all they ever do when
> installing a new motor.) The drive shaft went in pretty smoothly,
> although it is kind of hard to tell from the back of the craft.
>
> Is this vibration an alignment issue? Motor balancing issue? Something
> to be very concerned with or just a little concerned with?
>
> Now that the motor is installed with manifolds, etc., I do not have
> access to the mounting bolts.
>
> Thanks for you replies!!!
>

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