Quote:
Originally Posted by MakoMike
Change out the impeller, its due for a change anyway, then follow the cooling system and clean out every where you can reach.
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What he said! Impeller. I changed mine every season just so I could sleep better. it is not hard (but it may be be a bit of a challenge on a 1985 unit) If it is still clogged you probably have a internal corrosion issue that could be more involved.
You will find that those older motors will not run very well on today's fuel. Start researching fresh power.