1998 carb 951....what counterbalance shaft oil

[SteveDavisLP]

I have the engine out of the GSX and was cleaning it up etc and was going to change the counterbalance oil. The manual says 40 mL of SAE 30 but I saw a post that SeaDoo supposedly started recommending to put 75/90 synthetic in it. Anyone wish to chime in?

 

[mikidymac]

SAE 30 is what I have always used.

 

[Marky_Marc]

Apparently you can use the Jet Pump oil. I went with the SAE 30. I replace mine every 10 hours, extreme yes, but it's a 951, it needs all the love it can get!

 

[SteveDavisLP]

SAE 30 is what I have always used.

I have a quart of Royal Purple synthetic or do you think I would be better off with regular dino?

 

[SteveDavisLP]

Apparently you can use the Jet Pump oil. I went with the SAE 30. I replace mine every 10 hours, extreme yes, but it's a 951, it needs all the love it can get!

Someone thought SeaDoo, after 1998, started using the Jet Pump oil but there was no follow-up discussion on it thus my post

 

[DanSquires]

Seadoo did in fact suggest 40mL gear oil in (whatever later) year, or synthetic jet pump oil.. I use Mobil 75-90

 

[mikidymac]

I think you will be fine with either as long as it is fresh clean oil.

 

[harryjt]

if you read the service manual . it says straight 30 weight for the carb version and jet pump oil for the di version i wonder if its because of the air pump on the di version

 

[SteveDavisLP]

if you read the service manual . it says straight 30 weight for the carb version and jet pump oil for the di version i wonder if its because of the air pump on the di version

Correct but it is my understanding that SeaDoo later on started recommending putting pump oil in it. I doubt it matters either way as long as it is changed every 100 hours or so.