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Discussion in 'Diesel Engines/Drives/Transmissions/Props' started by Hampton, Nov 16, 2011.
Thanks for the advice
There may be more than one problem causing all this and you may have peeled away a few of them. Looking at your Racor filteres, I noticed that one of them shows dirt only on the lower half. My 48DA was doing that on one engine. The problem was air seeping into the fuel system under the Racor cover. The bowl was half empty when I checked it on one of the filter housings. It was a recurring issue and the cover was very sensitive. I needed to crank it down hard and make sure ther rim was super clean. Once the tab on the Racor handle got pinched in the gasket. It did not cause a performance problem all the time, but when it did at worst it would air lock the engine. At best, it would hesitate.
I change my impellers every 2 seasons during winter layup. I take the pumps off because it is easier to pull and install the impeller on the bench. My impeller kit comes with an o-ring for the pump but I’d like to replace the o-rings on the in/out pipes that connect to the pump. Can anyone tell me the part number for those o-rings?
Boat is new to me with 950Hrs so I am doing some PM work. I am installing new belts to start with. Is there any reason that I should be changing the Idler Pulley or Tensioner also? Do they have a service schedule as well?
That is the first thing I did when I got my boat as well. I had one belt that was making a little “dust.” I did not change anything but the belts, and no more dust. If you go back and read the beginning of this thread, there is a lengthy discussion around the belts. I keep one new one and the best one of the two I changed out as spares. It appears that Cummins’ are notorious for going through belts.
Does anyone have P/N for Thermostats and gasket? I also heard there were two thermostats per engine. Is that true? if so are they the same? Thanks..
villain style...re belt tensioner.....if it looks like this, change it!
Gasket (need 2) 145581
You may also want o-ring 145582, it's between the pipe and heat exchanger, you need to remove that pipe to get to the thermostat.
There is only one thermostat per engine.
You can register at https://quickserve.cummins.com with one or both of your engine serial numbers, from there you get all the parts diagrams, manuals etc.
Thank you - I am on Quickserve.cummins but I cannot get to any parts diagrams. I'll look again. Thank you for the response..
I assume all regions have the same pages but maybe not.
In pic below, select one of your ESN's on the left, then above that click Parts.
Once on the parts view, make sure you select "Display Upfits" to show the marinized portions of the engine that were supplied from the factory (which for Sea ray was everything painted white and attached to engine).