Lost # 6 cylinder today

I dont know if I put it into words as well as it could be, so here are some pictures of the pistions.

100_4669.sized.jpg







100_4670.sized.jpg
 
My other thought is instead of buying a piston at $100.00 is to take the non beveled piston to a machine shop and have it beveled.

Any thought either way?
 
My opinion

Cut it. I don't know the reason for the bevel unless there is a clearance issue in the block at the combustion chamber or different porting from one block to another. If you don't cut it you would have more compression on that hole or worse, interference. You can take it to a machine shop or you can take out the file and do it yourself. You will get it plenty close enough just don't use anything that will cause a build up of heat and make sure it is nice and smooth like the rest of the piston.
I responded to this thread earlier that the tower of power likes to spin free but was wrong on the rpm. Some of the 150 hp inlines like to spin up to 6800 to 7000 but I read somewhere that the 90 and 115 like fewer like 5800 to 6200 max. The fact that it lived as long as it did is proof that you must have been doing it right all along.
How about the tools, were you successful in locating the tools you needed?
 
RidgeRunner said:
Cut it. I don't know the reason for the bevel unless there is a clearance issue in the block at the combustion chamber or different porting from one block to another. If you don't cut it you would have more compression on that hole or worse, interference. You can take it to a machine shop or you can take out the file and do it yourself. You will get it plenty close enough just don't use anything that will cause a build up of heat and make sure it is nice and smooth like the rest of the piston.
I responded to this thread earlier that the tower of power likes to spin free but was wrong on the rpm. Some of the 150 hp inlines like to spin up to 6800 to 7000 but I read somewhere that the 90 and 115 like fewer like 5800 to 6200 max. The fact that it lived as long as it did is proof that you must have been doing it right all along.
How about the tools, were you successful in locating the tools you needed?
Click to expand...

Since I have 5 non beveled pistons I will probably play with one to do it myself. As to the rpm's the manual calls for 5000 to 5200. I have the largest jets in the carbs to make sure it is rich, use only Quick silver oil and as per two different mechanics which dont know each other, I run premium gas for the octane, helps prevent knock. I have most of the tools coming with the order of parts and found the two tools that are NLA at Powerhouse marine, these two are in my pocession now. If you need to do a rebuild on one of these let me know and I can sent up a rental plan for the tools. LOL
 
Well its been a long time in the making but I finally got her running on the muffs. Now I just need to put her in the water to set the idle in forward gear. She sounds better than ever.

I will try to post photos from where I left off along with quick captions for those who are interested.

Durwood
 
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