KAD44 issue

petem

petem

Well-Known Member
Joined
16 May 2001
Messages
19,106
Location
Cotswolds / Altea
www.fairlineownersclub.com
Gggrrrr, boat has developed an odd problem. When starting the port engine from cold and on tickover I get intermittent short screeching noises with momentary increases in revs. Restart and boat runs and performs fine. Have not managed to replicate issue with engineer present but will try again from a cold star tomorrow.

Any ideas?
 
Belts can look good and still screech, try spraying a bit of silicone lubricant on the belts and see if the noise immediately stops. If it does stop it will only stop for a minute or so, but it will rule in/out belts.
 
Ps if it is the belts screeching, then the next step is to work out why they are slipping, has a pulley siezed? Is the alternator seizing up etc etc, water pump, power steering pump etc etc.
 
petem said:
Belts all look good so we don't think it's that.
Click to expand...

The crank to water pump belt is usually the culprit. Especially if the boat has stood a short while and developed a bit of flash rust on the crank pulley wheel. Soon clears and then isn't replicated.
 
Replace the belts. Most likely the main circulation belt.

Use genuine belts, whoever makes them does a good job. Do not use Gates unless you want screeching after 10 hours... Don't ask how I know
 
BTW sounds awful. Much worse than the un-silenced SC of a 42 on kickdown. Make you sit up and take notice for sure. :D
 
Not sure I follow the deal.

If it is the belt I get a beer fridge stocked ( you should see the size of it !) if not we are quits. Sounds win win !

Honestly Pete squeal is a belt. It eases post starting as batteries get slug of energy ( sub particles maybe!) from the alternator reducing demand and stopping belt slip
 
jrudge said:
Not sure I follow the deal.

If it is the belt I get a beer fridge stocked ( you should see the size of it !) if not we are quits. Sounds win win !

Honestly Pete squeal is a belt. It eases post starting as batteries get slug of energy ( sub particles maybe!) from the alternator reducing demand and stopping belt slip
Click to expand...

And wouldn't rpm rise be consistent with a belt slipping = reduction in load on the engine?
 
So we had the belts checked and adjusted last week and the supercharger oil was also checked and changed.

My partner was onboard this weekend, did about 10 miles down the coast with no issues. On his return the issue reoccurred whilst at sea at displacement speed (screeching, revs all over the place and some smoke). Not sure if was smoke or belt dust.

Kashurst suggested a blocked fuel filter so this will be investigated this week (perhaps out bumpy Ibiza trip disturbed some sediment at the bottom of the tank).

Our engine guy will take another look this week.

Any other thoughts?
 
You must log in or register to reply here.

Share this page

Top