Oem Yamaha 760 head gasket thickness?

[MTRHEAD]

can someone please measure an OEM 760 head gasket for me please. Must be Yamaha OEM 760

How thick and how many layers?

Note: I have purchased 2 replacements from reputable companies. One was 2 layer .020” , the other was 3 layer .040”. To top it off blowsion lists the thickness at .050” and groupk’s documentation says .030”. WTF! Unreal.....I tend to believe groupk

 

[user_error]

I have one here that measures .030" and is 2 layers. It came from a 1997 gp760. I am 99% sure it is oem as the motor looked untouched when I bought it. I believe a friend of mine confirmed the oem metal 760 hg was .030", I'll ask for his sources.

 

[MTRHEAD]

Thanks! Funny how pathetic the aftermarket can be

 

[user_error]

There are definitely some cases where aftermarket is NOT the way to go. I've learned that over the years.

 

[MTRHEAD]

Groupk documents say 3 layers. Lol. I guess I should just buy an OEM one and find out for sure! Maybe Yamaha had a cost savings and went 2 from 3? Maybe groupk was wrong

 

[Jhucke]

Anyone know what compression numbers I should expect from a stock 760 head gasket with a 61x head? Lites boat.. Someone told me I may need a custom one.

 

[Half flip95]

theres a guy on here that builds lites set-ups. he sells the cylinder kits on here. im pretty sure he stocks all the different headgaskets and has all the answers you are looking for. im not sure if he gives the info away for free though

 

[Jhucke]

http://www.x-h2o.com/index.php?threads/superjet-701-760-metal-head-and-base-gaskets.183405/

He's got them here, but yeah, hes not free. And how would you be able to charge someone for telling them what head gasket to run, you really can't so I'm sure he would only build you a motor an entire motor.

 

[user_error]

because lites is highly competitive, sometimes key information is valuable

 

[Jhucke]

because lites is highly competitive, sometimes key information is valuable

I edited my post, I didn't mean to say that I was unhappy with him not handing out info or anything, I understand why he wouldn't.

 

[MTRHEAD]

Just got an OEM 760 head gasket still stapled in the OEM package

3 layers
2 main gaskets .010” each
1 center thin layer .006”

.026” total thickness My measurements are within .0005”. Checked with 4 micrometers
at work. If you ran the micrometer hard enough you could read .025”

Yet to find one aftermarket company that sells correct thickness. Typical in this industry

 

[Big Kahuna]

Took you 13 1/2 Months to get an answer?

 

[MTRHEAD]

Took you 13 1/2 Months to get an answer?

Lol. Life sometimes brings tangents! I finally bought an OEM gasket because I “needed” it

 

[user_error]

Good info John thank you for sharing

 

[jpswift1]

Thanks for this info! I'm going to be putting the 760 head gasket on my 701 with a stock milled head and added dual cooling. It looks like aftermarket ones are cheaper, but I'm going with OEM here to get the correct .025" thickness.

 

[Jhucke]

Just got an OEM 760 head gasket still stapled in the OEM package

3 layers
2 main gaskets .010” each
1 center thin layer .006”

.026” total thickness My measurements are within .0005”. Checked with 4 micrometers
at work. If you ran the micrometer hard enough you could read .025”

Yet to find one aftermarket company that sells correct thickness. Typical in this industry

Did you check squish after install?

 

[SUPERJET-113]

My 760 head gaskets are the same as OEM. 3 layers embossed stainless steel, .025" total thickness.

 

[jpswift1]

My 760 head gaskets are the same as OEM. 3 layers embossed stainless steel, .025" total thickness.

What brand 760 aftermarket head gasket do you use?

 

[Big Kahuna]

What brand 760 aftermarket head gasket do you use?

He is the brand............

 

[jpswift1]

Thanks for the heads up, I see in his signature now about making gaskets.

He is the brand............