454 horizons

So it looks like I possibly blew my Port engine as I was cruising along at approx 3400 revs the oil pressure dropped to 10 PSI. I grabbed the throttle and pulled it back in and shutdown in a hurry. I bumped the hatch up a bit while I was still moving and had wifey take a look and when I asked...

Hi All, Twin ‘98 7.4 454 Horizon Engines looking for some general suggestions on what to check as my port rpms are jumping around a good bit. Not at idle but at running speed up to 400 rpms up and down. Starboard maybe 100 rpm fluctuations. Not sure if injectors are all original or not but...

I have a 1998 Sea Ray 37 EC with 454 7.1 Horizons inboards.when I start engine cold they run great for hours. When I stop engine for 3-4 hours they won't stay running. backfire, no idle try everything.wait 3 more hours there cold and they start right up and run great. they will also start if...