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Does a Chrysler 1971 225 Marine engine take unleaded or Diesel

B

brodannyc

New member
just bought and old pacemaker

just bought and old pacemaker boat and wanted to see if the 1971 Chrysler 225 Engine takes unleaded or diesel?

Thanks in advance

Dan
 
"You should check the nameplat

"You should check the nameplate and/or have someone look at the engine first, but a Chrysler 225 1971 should be a model LM318, gas engine. Regular or mid-grade gas, not diesel.

There were Chrysler diesel engines too, but not a model 225 that I am aware of.

A gas engine will have a carburetor and spark plugs. Diesel engine will have injectors."
 
"Dan,
Are you talking horse

"Dan,
Are you talking horse power or cubic inches?

A 225 cubic inch would be a Chrysler "slant six" engine. That is an inline 6 cylinder engine slanted to reduce the height of the engine as I understand. In '71 the valve seats were not hardened and they needed leaded gas. I have heard of the slant sixes in marine applications.

The LM318 (318 cubic inch) is is a Chrysler marine "V-8" gasoline engine. Again, a '71 would not have hardened valve seats.

Hope this helps"
 
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