Dual Bravos...same clanking noise???
06-08-2021, 08:25 PM
#11
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TY... just never encountered red gear oil in a marine application.
I have no personal experience with the Redline Syn gear oil, but - the Amsoil synthetic gear oil in a B-drive will act up with delayed shifts and the noises that follow due too much slip in the cone clutches - not sure if that is relatable to your oil or not - just putting that out there for consideration.
I have no personal experience with the Redline Syn gear oil, but - the Amsoil synthetic gear oil in a B-drive will act up with delayed shifts and the noises that follow due too much slip in the cone clutches - not sure if that is relatable to your oil or not - just putting that out there for consideration.
06-08-2021, 08:57 PM
#12
Registered
Thread Starter
TY... just never encountered red gear oil in a marine application.
I have no personal experience with the Redline Syn gear oil, but - the Amsoil synthetic gear oil in a B-drive will act up with delayed shifts and the noises that follow due too much slip in the cone clutches - not sure if that is relatable to your oil or not - just putting that out there for consideration.
I have no personal experience with the Redline Syn gear oil, but - the Amsoil synthetic gear oil in a B-drive will act up with delayed shifts and the noises that follow due too much slip in the cone clutches - not sure if that is relatable to your oil or not - just putting that out there for consideration.
Is this the recommended stuff:
Last edited by F14A water jet; 06-09-2021 at 06:45 AM.
06-08-2021, 11:59 PM
#13
Charter Member # 55
Charter Member
Mercruiser HP gear lube as you have pictured is the normal lube used in Bravo 1's.
Quicksilver HP gear Lube is the EXACT same gear lube and is just packaged/labeled for regular retail stores. $10 at Walmart.
Are you sure the clanking is not your internal exhaust flappers??
Quicksilver HP gear Lube is the EXACT same gear lube and is just packaged/labeled for regular retail stores. $10 at Walmart.
Are you sure the clanking is not your internal exhaust flappers??
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06-09-2021, 06:50 AM
#14
Registered
Thread Starter
Mercruiser HP gear lube as you have pictured is the normal lube used in Bravo 1's.
Quicksilver HP gear Lube is the EXACT same gear lube and is just packaged/labeled for regular retail stores. $10 at Walmart.
Are you sure the clanking is not your internal exhaust flappers??
Quicksilver HP gear Lube is the EXACT same gear lube and is just packaged/labeled for regular retail stores. $10 at Walmart.
Are you sure the clanking is not your internal exhaust flappers??
06-09-2021, 07:17 AM
#15
Registered
Your top gear set/ cone clutches is right under the cap..... If the issue was mine, I would drain and refill with the Merc High perf. gear oil and see if the problem persists.
Even at the cost of the oil, it is cheaper than having a tech diagnose the issue where the synthetic gear is a possible cause... even 1 drive just to eliminate the possibility.
If it persists, you are into parts.
Even at the cost of the oil, it is cheaper than having a tech diagnose the issue where the synthetic gear is a possible cause... even 1 drive just to eliminate the possibility.
If it persists, you are into parts.
Last edited by speicher lane; 06-09-2021 at 07:26 AM.
06-09-2021, 09:11 AM
#16
Registered
Thread Starter
Your top gear set/ cone clutches is right under the cap..... If the issue was mine, I would drain and refill with the Merc High perf. gear oil and see if the problem persists.
Even at the cost of the oil, it is cheaper than having a tech diagnose the issue where the synthetic gear is a possible cause... even 1 drive just to eliminate the possibility.
If it persists, you are into parts.
Even at the cost of the oil, it is cheaper than having a tech diagnose the issue where the synthetic gear is a possible cause... even 1 drive just to eliminate the possibility.
If it persists, you are into parts.
abnormal noise coming from bravo one
Last edited by F14A water jet; 06-09-2021 at 09:24 AM.
06-18-2021, 08:57 PM
#17
Registered
Idling in neutral, mine will make a sorta rhythmic knunking sound at times. Other times I don't hear it. Mine sounds like it's behind the eng. I was told it's the input shaft rattling inside the drive coupler when it's spinning with no load and it's nothing to worry abt. Never tried listening for it outside the boat but I could see the knunking transferring into the drive. Try listening behind the eng for the sound.
Go with the Merc/Quicksilver lube for sure. It's good stuff.
Go with the Merc/Quicksilver lube for sure. It's good stuff.
06-19-2021, 04:03 PM
#19
Registered
Thread Starter
Idling in neutral, mine will make a sorta rhythmic knunking sound at times. Other times I don't hear it. Mine sounds like it's behind the eng. I was told it's the input shaft rattling inside the drive coupler when it's spinning with no load and it's nothing to worry abt. Never tried listening for it outside the boat but I could see the knunking transferring into the drive. Try listening behind the eng for the sound.
Go with the Merc/Quicksilver lube for sure. It's good stuff.
Go with the Merc/Quicksilver lube for sure. It's good stuff.
06-19-2021, 04:08 PM
#20
Registered
Thread Starter
Are you saying engine cam overlap? That is curious because I have just reduced the engine idle rpms to reduce stern drive engagement stress. The warm engines would hover about 1,000-1,100 rpms and I reduced that to ~750 rpms. I wonder if this is a new/induced vibration/noise due to that.
I have been warned about reveberation, so I may bump them back closer to 850...and maybe solve the issue.
KEEP THE INPUTS COMING... I take them all in and am getting a lot of good advise/experience.
I have been warned about reveberation, so I may bump them back closer to 850...and maybe solve the issue.
KEEP THE INPUTS COMING... I take them all in and am getting a lot of good advise/experience.
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TomZ (06-19-2021)
