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It will not hurt running without the oil cooler but I would like to add one to my motor if I ever find the parts for reasonable. If anyone has a AQ151
Adapt the oil cooler to the garden hose and give it a good blast of high pressure water both ways I really suspect it is causing the issue.
Take it back to your mechanic that fixed it the first time
Anyone else care to make comment.please do
Did you choke the motor after it warmed up? It could be you flooded the motor the first time when it wouldnt start after it was warm. Your motor should