<OT103837>
Hey guys, new to the forums and hope that I have placed this in the correct spot, if not sorry in advanced.
Recently purchased 89 champion bass boat with a mercury xr6 150 on it. The 150 has a surge and would die if trying to maintain a steady rpm for any length of distance like running out of fuel.
I thought maybe old fuel as it had sat for 8 or so months. Drained all the old gas out, noticed a split fuel line so replaced from pickup tube all the way to carbs, took it the the lake same out come. Had it looked at and was told fuel pump diaphragms had busted. Back to the water with rebuilt fuel pump and carbs gone through and synced.
Same outcome.
Had it looked over again and found that the stator or trigger was breaking down, replaced both.
Back to Lake for test drive, she ran alot better with no more hard starts and ran pretty good, except while holding a steady rpm she surges with rpms going up and down while trying to stay on plain.
I can push the key in and it stops surging for a few seconds.
So, fuel system replaced as well as carbs, stator and triger, new plugs.
Also it was oil pump deleted when I got it.
Any help would be greatly appreciated, as me and mechanic haven't had any luck.