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Going back to oil injection 951

I just bought two 1998 seadoo 951s gsx's; one is the gray ghost with white engine and one is the red traditional normal unit with the silver engine. Both had been converted to premix by previous owner. I've owned skis before that have been on premix and I wasn't really a fan as they burn a lot more oil than when using the oil injection and full synthetic oil is not cheap. The previous owner left the oil pumps on the units and simply capped them off when they did the conversion. My question is if I convert these back to oil injection should I buy two new oil pumps as the pumps would have been running dry with no oil for an undisclosed amount of time. I'm assuming leaving the old oil pumps on the ski, but having no oil hooked up to them could possibly ruin the oil pumps or at least decrease their life. The other question is, is it really worth going back to oil injection or should I just leave them on premix. The engine on the gray ghost was only at 110 for the compression so I'm having that one fully rebuilt including the crank and already have that engine pulled from the ski. The Red ski more than likely has been rebuilt in the past because the compression was at 125 which is a little low but still runnable. I paid 1400 for the 2 skis and a double trailer and I'm looking forward to working on them this winter.
 

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Oil Injection is more convenient. On the pumps, did they only cap the oil or did they remove the pump drives? I'd surely replace the pumps if they ran them with no oil but you can test them. I would expect them to seize up but... one never knows.

Even with injection I run 100:1 premix. I like a little oil in the mix. It also stabilized the fuel and provides extra oil at low RPM. My preference. I find premix a pain in the but if you are riding a lot, carrying fuel containers, premixing.... remembering which containers have premix.... LOL thank goodness for the color. Injection is one less thing to worry about. I bet those skis FLY with 951s in there. Good luck !!
 
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