New jet boat owner with Dominator Jet Questions

« **on:** August 04, 2011, 07:56:37 PM »

Thanks in advance for any help,
I want to disconnect My jet from the engine so I can run it safely out of water. I've read that some are not removable without lifting the engine. Can the Dominator MB-12-S Driveline be removed with the Engine in place? and how. I'm mechanically inclined but new to Jet boats, I'm sure I can figure it out but want to know the proper and best way to do it before I try and inadvertently break something

I have included a pic of the drive line.

Thanks,
James

New jet boat owner with Dominator Jet Questions

« **Reply #1 on:** August 04, 2011, 08:51:45 PM »

James , there is no simple way to do what you want to do sans pulling the engine , your early H bar driveline was not deasigned to be removed or disconnected with out engine or jet removal .. Tom

« **Reply #2 on:** August 04, 2011, 09:37:19 PM »

Quote from: jet boat performance on August 04, 2011, 08:51:45 PM

James , there is no simple way to do what you want to do sans pulling the engine , your early H bar driveline was not deasigned to be removed or disconnected with out engine or jet removal .. Tom

Thank you for clearing that up for me, looks like tuning will be done at the local lake

« **Reply #3 on:** August 08, 2011, 09:54:03 PM »

I was going over my jet and could only find one zerk fitting shown in the picture below. Is this the only lube point on the Dominator MB-12-S? Also, I know it's not recommended to mix the grease but I have no Idea whats in there. Whats the best grease to use in this situation?

Thanks again,
James

« **Reply #4 on:** August 12, 2011, 08:37:21 PM »

Re pump grease we use/sell Lucas Red and Tacky , excellent stuff Lots of great products ! Tom

« **Reply #5 on:** August 12, 2011, 08:59:29 PM »

Quote from: jet boat performance on August 12, 2011, 08:37:21 PM

Re pump grease we use/sell Lucas Red and Tacky , excellent stuff Lots of great products ! Tom

Will it be ok to mix that with whatever might be in there now?

« **Reply #6 on:** August 13, 2011, 09:09:00 PM »

Hard question to answer .... unless we know what lube is currently "in there" and use it instead I suppose its a Crap shot , I don't belive it would do any harm Tom

« **Reply #7 on:** August 26, 2011, 04:29:54 PM »

I still have one concern. on my model, how does the bowl bearing get lubricated? everything I find online says to lube the thrust and bowl bearings. My jet does not have a zerk for the bowl. I found the Dominator manual at my Father's and read it through. It does clearly state "Your DOMINATOR JET DRIVE requires lubrication of only one bearing, the thrust bearing" Does this mean it's water lubricated? does this set up result in more frequent bearing failures? it's been some time since the jet was last re-built, what should I look out for?

Thanks,
James

« **Reply #8 on:** March 11, 2012, 08:16:24 AM »

Quote from: metallicats33 on August 26, 2011, 04:29:54 PM

I still have one concern. on my model, how does the bowl bearing get lubricated? everything I find online says to lube the thrust and bowl bearings. My jet does not have a zerk for the bowl. I found the Dominator manual at my Father's and read it through. It does clearly state "Your DOMINATOR JET DRIVE requires lubrication of only one bearing, the thrust bearing" Does this mean it's water lubricated? does this set up result in more frequent bearing failures? it's been some time since the jet was last re-built, what should I look out for?

Thanks,
James

Better late than never, the shaft rides in a bronze bushing in the bowl.

Jack at MPD machined a place for a seal in mine to keep the sand out so this doesn't happen again for a long time.

Sent from my ADR6400L using Tapatalk

« **Reply #9 on:** March 16, 2012, 06:02:01 AM »

Quote from: metallicats33 on August 26, 2011, 04:29:54 PM

I still have one concern. on my model, how does the bowl bearing get lubricated? everything I find online says to lube the thrust and bowl bearings. My jet does not have a zerk for the bowl. I found the Dominator manual at my Father's and read it through. It does clearly state "Your DOMINATOR JET DRIVE requires lubrication of only one bearing, the thrust bearing" Does this mean it's water lubricated? does this set up result in more frequent bearing failures? it's been some time since the jet was last re-built, what should I look out for?

Thanks,
James

With no model number its a guess but likley is you are correct in your thinking and Dominator does likley have water cooled and lubed tailshaft bushings. These are a Garlock or DU composition insert similar to a cam bearing in an engine in both composition and design, the require no service and yes the are subject to failure primarily from wear and the jets natural processing of sand, grit and silt etc while operating , There are kits and mods available to convert these to a grease lube type , but removal and re-installation of the carrier sleeve if equipt can be tricky and the bowl can be terminally damaged if not done correctly Tom

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