'91 XP - bogs on left turn

[cobrajeff]

Got my '91 xp back on the water last season after having the starter replaced. Seemed to run well, but, then I noticed that on a hard left turn, the boat slows down dramatically. Runs fine straight ahead, and on a hard right, but, if I steer left, it loses rpm's very quickly (even with WOT). Doesn't completely stall, but really slows down. Any ideas? Thank you.

Jeff

 

[timmyboy76]

factorypipe.com

PERFORMANCE TIPS
The "Left Turn Syndrome"
You will find in all instances that your watercraft will turn more easily to the right than to the left. The reasons are basically simple. First, engine torque constantly places pressure on the hull to turn right. If your engine's performance is marginal, you can notice a dramatic falloff in power in a hard turn. This power falloff can't always be blamed on the engine, being over-propped can also cause the engine to slow enough to fall off its power peak. An engine with a peaky power curve is especially susceptible to a very dramatic power loss in a hard left turn. Most recently, with the increase of Sport and Runabout racing, there has been a marked improvement in hull design with a dramatic increase in "G" forces encountered while turning: over 2.5 G's. In some instances such a hard turn can cause momentary loss of power due to fuel starvation in the carbs. Jetting changes cannot correct this situation, the best solution is to rotate the mounting of the carbs 90 deg, so that their throttle shafts are perpendicular to the crankshaft axis rather that parallel. To date, this solution to the problem has been 100% successful