block re-lined? and 65 vs 70 hp

[lake_time]

Hi,<br />I was looking into getting a block relined. The center piston is burnt and the owner says he’ll sell it for $150. Will this later model 70hp this fit on my ‘73 65h lower?? What was the difference between the 65 and 70 models (and don’t say 5hp) Were most of the 3 cylinder blocks interchangeable?<br />Anyway if someone knows of an outfit that does this or an approximate coat I would be very grateful.<br /><br />Thanks<br /><br />Dave

 

[corm]

Re: block re-lined? and 65 vs 70 hp

Hi Lake_Time,<br />OK I will not say it.<br />5 HP<br />Ok I lied.

<br />If the driveshaft spline and the base gasket<br />are the same it may work.<br />You would have to bore one cyl oversized and<br />put in an oversized piston.What yr is the 70.<br />...hehe...corm

 

[lake_time]

Re: block re-lined? and 65 vs 70 hp

It look like the 70hp block is really a 75hp and it 76 model.<br /><br />Did they come in 2 lower shaft diameters? or did I just dream that..<br /><br />Anyway I'll need one cylinder re-finished. and a larger piston.. Any idear what that costs. (ball park)<br /><br />Dave

 

[lake_time]

Re: block re-lined? and 65 vs 70 hp

Question. When getting a block redone, do you bore out all the cylinders of just the one that is damaged?<br /><br />My thought would be if you just did the burnt one and put a larger piston in it would unbalance the crank. Or would it??<br /><br />An experts advice please?<br /><br />PS I have a case of beer bet on this one with a buddy..

 

[corm]

Re: block re-lined? and 65 vs 70 hp

Hi L_T,<br />The wt of the std and os piston are so close<br />it wont make a difference on a pleasure boat.<br />On a race engine it's a different story.<br />If the bores are OK n the others hone them<br />and re-ring em. It is best to do them all,but<br />the factory says you don't have to.<br />...have fun...corm ( did I win a beer?)

 

[lake_time]

Re: block re-lined? and 65 vs 70 hp

That what I said!!! The Beer is MINE!!!<br /><br />I'll share if you are in the denver area some time<br /><br />Thanks<br /><br />Dave

 

[corm]

Re: block re-lined? and 65 vs 70 hp

COOL