Hi all,
I have Crusader 454s from about 1990. They are fresh water cooled systems with heat exchangers. Port is a Mark 4 and starboard is Gen 5. Starboard was apparently replaced under warranty early in the boats life.
I have owned the boat since Dec. Maintenance records are not available. Supposedly risers and elbows were changed about 2 years ago, no proof though. Engines have about 1100 hours on them.
I have minimal steam from both exhausts up to about 3000 rpm. Above 3000 the port engine puts out excessive steam, the starboard stays the same.
Port engine temperature stays at about 165 at 3000 rpm. Starboard is about 170.
I measured temp of the elbows with an IR gun after a 15 minute run at 3000 rpm with engines back at idle. Starboard was 98, port was 108. Engines had been idling for about 5-10 minutes by the time I measured the temps.
I recently treated both cooling systems with Rydlyme re-circulation. This does not include the risers and elbows though. Raw water pumps and impellers are new. Belts are tight.
Next step? Pull the port risers and elbows to inspect?
Thanks,
Barry
I have Crusader 454s from about 1990. They are fresh water cooled systems with heat exchangers. Port is a Mark 4 and starboard is Gen 5. Starboard was apparently replaced under warranty early in the boats life.
I have owned the boat since Dec. Maintenance records are not available. Supposedly risers and elbows were changed about 2 years ago, no proof though. Engines have about 1100 hours on them.
I have minimal steam from both exhausts up to about 3000 rpm. Above 3000 the port engine puts out excessive steam, the starboard stays the same.
Port engine temperature stays at about 165 at 3000 rpm. Starboard is about 170.
I measured temp of the elbows with an IR gun after a 15 minute run at 3000 rpm with engines back at idle. Starboard was 98, port was 108. Engines had been idling for about 5-10 minutes by the time I measured the temps.
I recently treated both cooling systems with Rydlyme re-circulation. This does not include the risers and elbows though. Raw water pumps and impellers are new. Belts are tight.
Next step? Pull the port risers and elbows to inspect?
Thanks,
Barry