Some years ago the Dolmar PS 6400, 7300 and 7900 made their debut here.
The 7900, according to the users used to develop cracks near the bearing seats.
The reason at that time was attributed to the stress of the extra power imposed on the 6400 crankshaft and crankcase when it was the 7900.
The PS7900 therefore was considered a 'failure' or 'bad buy' and lost the battle and departed the scene.
Before some of you start rising up in arms against me, this was what happened here in India.Remember, its a different country, different user (abuser?), different usage.
Up to a point the 385XP too had the problem of cracking crankcases.Again, I repeat, here in India.
This used to happen on the starter side and was caused primarily because users dont bother about the starter screws.That is, they only do something when they are down to just a single screw.They cannot start the saw at that point.
But, by then the damage would have already occurred. The area around the loose screws would have already developed cracks.
Back to the Makitas.
Now The PS 6400, 7300 and 7900 are coming back here with the DCS prefix.
Memories of the PS7900 are still fresh in the minds of the users.
Though I never was involved with Dolmar saws, I might get a bit of involvement with the Makita saws.
I was going through the specifications of all three. I did not see any figures that could possibly crack crankcases.
Quality of manufacture was then the question.I dont see the Germans cutting essential corners at the price of reliability.
Design? If such a thing as a fault in design existed, it should be there everywhere.That is why I started this post.
And going by the responses, I dont see any clues to that having happened.
So, the only possibility is that my fellow countrymen, who were just getting to know the proper use of chainsaws wrecked those Dolmars out of inexperience.