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Looking for fuel recipe for boat engine

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Looking for fuel recipe for boat engine

Old 02-07-2021, 10:44 AM
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vuuli312
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Default Looking for fuel recipe for boat engine

Hi.Looking for a recipe for my deep vee powered by os max .77 vrm engine.I researched boat fuels seems 18% is the recommended oil percentage.i have methanol, klotz 198 synthetic oil, klotz castor oil (to protect against kean run) and nitro methane.I interested in sport boating so 25% nitro is fine.What is the proportions of ingredients and method on a per gallon basis.Any comments advice appreciated.Thanks

Old 02-11-2021, 11:58 AM
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JPMacG
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32 oz nitromethane
20.5 oz klotz synthetic
2.5 oz castor
73 oz methanol

This will produce 1 gallon of fuel with 25% nitro and 18% oil consisting of 16% synthetic and 2% castor.
Old 02-11-2021, 12:19 PM
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vuuli312
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Originally Posted by JPMacG View Post
32 oz nitromethane
20.5 oz klotz synthetic
2.5 oz castor
73 oz methanol

This will produce 1 gallon of fuel with 25% nitro and 18% oil consisting of 16% synthetic and 2% castor.
Thank you.How did you arrive at these quantities? Is there a formula? What is your opinion regarding this blend for sport boating?

Old 02-12-2021, 08:05 AM
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JPMacG
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I just multiplied the desired percentages (as a decimal, not percent) by 128, the number of ounces in a gallon. After I determined the quantity of oils and nitro I subtracted them from 128 to find the quantity of methanol.

I chose 2% castor because this is typical for an aircraft fuel blend. You wanted 18% oil and I made 2% castor, so 16% had to be synthetic.

I am not familiar with boat engines. 25% nitro is huge for airplane engines. They run just fine on 5% to 15%. Your oil content is the same as we would use in our aircraft engines.

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