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657X & 720 systems are matched for both engines. Bills86e PS: Because of my age, I am retired of the forums.

AS I posted previously, the early years electronics used matched sets and are different from each other. flywheel-stator-mpem. timing positions are in different locations, so you can't mis-match. you need to have this set on your rotax engine, as well also must have the correct valve per the...

Give us some background on the engine. History of your ski. If all is good, A new '93/94 carb would be good money well spent.

Crap......It realy stinks in there. A bow movement!

Read your *plugs. RFI's are senitive to water in fuel. At least, its cranking! compression fuel spark

Check the RV cover clearance, and recheck the carbs pop-off. A re-machined cover is about $100 at SBT, :cheers:

Plugs - compression - RV oil lines - fuel selector - inspect pulse & fuel lines & snug the connectors Plugs should be a mocka color Bills86e

I suggest you check the RV cover clearance, The bennefit is easier starting, Better performance, and longer Starter life as it will start faster & better top end rpm performance. Check our How-to section, get a free shop manual from the Sticky. Bills86e

Too much Air, .........not Enough fuel. (or no lubrication) Check all. [ RV oil line(s) ] gti & gtx raves on gtx may be stuck

Back to 787cc Basic's. Compression Spark Fuel raves http://partsfinder.onlinemicrofiche.com/seadooforums/showmodel.asp?Type=12&make=seadoojb&a=171&vehicleid=1998-Sea-Doo-Jet-Boat-Speedster Check * plugs fire fuel routeing pulse put a short hose on pto...

no....very different. My opinion is particles of metal, or even starter teeth bits are inside the magnito & flywheel, creating electrical spikes that interrupt the internal components in MPEM. Results are Internal TIMER shuts down. Read your manual or go to this forum HOW-TO section. Remove...

It should work, goodly.

I'd suggest a Starter rebuild, and cut the battery cable lugs off and solder on new ones, shrink wrap these.

Depends on the squish. Its probobly milled to increase PSI Combustion. When you know what these are, you would use an octane booster & OB gauge to mix the fuel to get the max power it can provide. More improvements mean less engine life span.

The 97's had a "sticky Rave" problem that just did not go away. The BRP engineers cured this with "Slotted" raves.

check the compression, BR8ES gapped .022. Could be air leak into the gas supply side of carb, as this sounds like not enough fuel, or even a seizer when she gets hot and the piston swells in the cylinder. Hope the two RV oil lines are still soft and not brittel and broken!

D/L a free manual for an SP (587) buy a plastic degree wheel to check what plate you have, and set mag piston TDC to slide the plate to the mark you made. Reverse the plate to get it set as close to spec as ya can. That manual will pictorily descibe in detail. The 1994 GTX came with a 657...

sugget you open the main jet 1/8th turn, til ya getter right. :willy_nilly: Willy-Nilly86

click for that picture of is #48. http://partsfinder.onlinemicrofiche.com/seadooforums/showmodel.asp?Type=13&make=seadoopwc&a=81&b=1&c=0&d=-MAGNETO-ASSY.-W/-OIL-PUMP I would like You to download from site the Shop Manual for your '99 GTX-RFI ski They had two models in '99. Yer...

Relay Issue If your cranking, getting spark then yes the start relay connect wires needs to be diagnosed for location, then operability. When this receives a signal, its internal piston rises to connect your two red cables. It may be corroded/frozen, or polarity reversed...