Official Caterpillar3116/3126 Thread

i took crappy notes last year - how many gallons of antifreeze are you guys running through a 3126 to winterize? I suck it up through the sea strainer. I seem to recall 7 gallons or so per engine?
 
thanks guys, going to buy a bunch today as I've heard supply might be limited
 
I know not a CAT question but most of us have the same Gen. What are you guys running for oil in the 7.6btd? Last year I did Rotella T4 15W-40

the manual states:
Use an engine oil regular or synthetic with an API classifica- tion of CF and/or CG-4. An oil viscosity rating of 15W-40 is recommended for all operating conditions.

i don’t see that spec called out on the T4 data sheet but I’m thinking maybe it was superseded by a later spec?
 
I know not a CAT question but most of us have the same Gen. What are you guys running for oil in the 7.6btd? Last year I did Rotella T4 15W-40

the manual states:
Use an engine oil regular or synthetic with an API classifica- tion of CF and/or CG-4. An oil viscosity rating of 15W-40 is recommended for all operating conditions.

i don’t see that spec called out on the T4 data sheet but I’m thinking maybe it was superseded by a later spec?
CG-4 is obsolete. Current spec is CK-4
https://www.api.org/products-and-se...categories-and-classifications/oil-categories
 
I know not a CAT question but most of us have the same Gen. What are you guys running for oil in the 7.6btd? Last year I did Rotella T4 15W-40

the manual states:
Use an engine oil regular or synthetic with an API classifica- tion of CF and/or CG-4. An oil viscosity rating of 15W-40 is recommended for all operating conditions.

i don’t see that spec called out on the T4 data sheet but I’m thinking maybe it was superseded by a later spec?
Same as mains... Rotella T1 30W
 
I know not a CAT question but most of us have the same Gen. What are you guys running for oil in the 7.6btd? Last year I did Rotella T4 15W-40

the manual states:
Use an engine oil regular or synthetic with an API classifica- tion of CF and/or CG-4. An oil viscosity rating of 15W-40 is recommended for all operating conditions.

i don’t see that spec called out on the T4 data sheet but I’m thinking maybe it was superseded by a later spec?


Last season I used the same 30wt that I used in the engines. I noticed the generator would be a little hard to start and crank longer than I would like. This year I had a brainstorm and put Rotella 15/40 in it and it fires on the second or third crank every time no matter the weather.
 
I saw that Westerbeke changed the viscosity recommendations on their 7.6 and 8.0 KW generators. They didn't bother to let owners of older generators know that unless you dug it up on their website.
I had several gallons of 15W40 in Tennessee so I hauled it to the beach for the generator. I changed the oil in March and noticed immediately that the 8 BTD clatter was louder. If you've ever been around a 450Da with a Westerbeke generator you know the more noise is not acceptable. I pumped out the 15W40 and went back to SAE 30, the original Westerbeke viscosity recommendation and the noise level returned to a liveable level.

I am in Panama City FL so starting ease in cold temperatures isn't a factor.
 
I saw that Westerbeke changed the viscosity recommendations on their 7.6 and 8.0 KW generators. They didn't bother to let owners of older generators know that unless you dug it up on their website.
I had several gallons of 15W40 in Tennessee so I hauled it to the beach for the generator. I changed the oil in March and noticed immediately that the 8 BTD clatter was louder. If you've ever been around a 450Da with a Westerbeke generator you know the more noise is not acceptable. I pumped out the 15W40 and went back to SAE 30, the original Westerbeke viscosity recommendation and the noise level returned to a liveable level.

I am in Panama City FL so starting ease in cold temperatures isn't a factor.

interesting. We’re you able to find any Westerbeke explanation of the change from 30W to 15W-30? We haven’t found the noise to be a huge bother in our 410 but I wouldn’t argue with a any noise reduction
 
interesting. We’re you able to find any Westerbeke explanation of the change from 30W to 15W-30? We haven’t found the noise to be a huge bother in our 410 but I wouldn’t argue with a any noise reduction
Mine is enclosed in a sound shield so I have never really paid too much attention...
 
I could never get mine out.
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3116 is surging! A few weeks ago I changed my racor filter before we went out for the weekend. Boat ran great.

The following week I started the engine and as I left the dock the engine died like it ran out of fuel. Both the primary and the racor we’re almost empty. (So yes the engine ran out of fuel). So as I was refilling the filters I noticed that the racor had leaked some fuel from the bowl. I did my best to tighten it and stop the leak I don’t think I was very successful. I primed the engine and left the dock with the boat running great. Weekend was uneventful.

I went to the boat today and the engine would not start. This time I used the engine primer. I switched the valve in line with the pump, loosened the pump, loosened the o ring sealed bolt/bleed to the right of the engine filter and pumped. It didn’t seem to do much but it was enough to get the engine started. (Rotated knob, tightened pump, tightened bleed. Engine started and ran like crap for 20 seconds like it usually does after a filter change. The difference is the engine was surging 80+ rpms. I took the boat for a ride I was able to get it up on plane after a few attempts and eventually the surge lowered to about 25 rpms.

My question: if can the engine pull air thru the leaky drain in the racor bowl? Or is there a new problem here.
I am going to swap out the racor with a new off brand tomorrow and see if that helps.
 

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