Larson 1993 220 SEI with 5.7 V8 Not Starting

[Vinster]

The 5.7 V8 engine turns over slowly - two new batteries - but does not start. Cannot check spark with slow turn over. Any Advice?
Put marvel mystery oil in cylinders - now turns over quickly - mechanic spent 30 minutes - said low compression - suggested new engine - am I a fool for being a skeptic?

 

[Bt Doctur]

Re: Larson 1993 220 SEI with 5.7 V8 Not Starting

battery cables,starter needs rebuiding,cylinders rusted up, outdrive seized.

 

[Vinster]

Re: Larson 1993 220 SEI with 5.7 V8 Not Starting

Found blown head gasket - replaced - engine ran - but over heated at various RPM - replaced riser and manifolds - engine now runs great. Problem solved.