2 replies to this topic

[johnnyo]

HI all, I did quite a bit of research on different venues in dealing with my issue, I have one scored cylinder. on my 240 efi, Local generic machine shops do not have proper equipment to facilitate boring due to the bottom of cylinder not being free from the bore bit to fully get to the bottom of cylinder. My thoughts are to resleave. I have read many poss on other sites that say that the block can be put in the oven at 450 degrees the expansion rate of aluminum will exceed that of the steel sleeve allowing the sleeve to easily slide out, the new sleeve which will be in the freezer then can be inserted. Now to my question has anyone done this? Also can I simply heat up the block slide the existing sleeve up 2-3 inches allowing my local machine shop now to be able to fully bore/hone the existing sleeve, then reheat and slide back in then measure bore to determine how much oversize I may need to go on the piston. It is my understanding that with the 2 stroke going + 20-30 thousands over in one cylinder only is acceptable. any thoughts...no flaming..as I said I am simply trying to research and devise a cost effective approach. all the other cylinders are fine and I would at least re-ring the other pistons and scuff up cylinders with scotch bright so as to aid in seating rings in the other cylinders.

[bstuke]

John,

As much as I like to work on my boat and my Factory Five Cobra, I am no expert mechanic. I have not done this or talked to anyone that has.

I would recommend simply purchasing a reman short block from SBT and swapping out the rest of the components.

I have done this on both of my 727's and am very happy with the results.

I know times can be tough and saving money is key. I would say you have a 25% chance of getting it right, the other 75% would result in catastrophic failure.

Did you take it to a Mercury Marine? It is a pretty standard Mercury block.

[johnnyo]

This is exactly the answers I'm looking for I am new to seadoo and want and need to understand all options available yours will be an option to consider...money well spent right the first time is the lesson here, I appreciate the response, BTW you are killing me my next toy will be and always has been for an AC cobra and factory 5 I believe is out of Conn. is one of the better kits frame wise for the cobra kit how is it outfitted...engine, rear, steering?love to see some pics... Johnnyo