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#1
10-11-2011, 04:35 PM
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1990 351 Bogs at 2800 rpm
I have a 1990 TriStar 190 with the 351.
Recently it has started bogging down at WOT. Without a skier, it will only get up to about 3000rpm, and with a skier, it tops out at about 2800... And when I turn a corner, the it drops down to about 2200, and sometimes won't do any more than that.. Usually it will gradually work back up to 2400-2600 if I keep it floored once I come out of the turn. I am assuming it's a carb issue, and I've already got the rebuild kit from holley, just haven't gotten around to doing it yet. (whenever I have spare time, I usually feel like skiing, not tinkering... then of course I get frustrated when it won't pull me right on slalom, and end up kneeboarding instead, since I don't need speed for that..) Just wanted to ask here, is carb the most likely culprit? What else should I check? (I've checked fuel filters, but that's about it..) 
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#2
10-12-2011, 02:09 PM
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Definitely sounds like a carb issue, possibly the secondaries are not opening up. Rebuild is fairly straightforward, mine went well. I would suggest you change both the fuel filter (by the fuel pump) and the water separator (in the bilge). I chased a stumble after my carb rebuild, both filters looked clean, but new ones cleaned up the issue.
Good luck, Kevin
__________________
1989 ProStar 190 with "Safe T Top", 351 Ford, GT 40 heads painted Ford Blue, Elec. Ign, 1:1, 720 hours, 4 blade prop, PP 6.5, removable platform brackets, custom color from factory, hot water shower, Boat Buddy & LED lights on trailer 2010 D3 Z7, 2 @ 32 off, 34 mph so far
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#3
10-13-2011, 11:33 AM
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Check your filter, fuel pressure, and fuel pickup in tank first before tearing into the carb. Definitely sounds like fuel flow limited.
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#4
10-13-2011, 12:39 PM
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Quote:
__________________
James 1989 MasterCraft TriStar 190 SE 
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#5
06-19-2012, 05:06 PM
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Any More Ideas?
So over the winter I've rebuilt my carb...
And it didn't help. The engine still bogs down when pulling a skier... And sometimes is tough to start. (sometimes starts right up..) But generally runs rough... Here's what I've done.... rebuilt carb with holley renew kit. replaced fuel water separator filter. replaced fuel filter on the fuel pump. checked fuel pickup in tank, it looks good.. checked anti-siphon valve, it looks ok.. removed and checked fuel lines between tank and filter, and filter and pump. They look good. (changed oil, replaced spark plugs) Changed distributor from points to EI from skidim.. Checked/adjusted timing after changing it out. (still running stock coil though) I replaced the fuel pump, but haven't had a chance to try it out yet.. but when I had the old one off, I didn't see anything obviously wrong (it sucked when I pumped) - so I'm not optimistic that it will help anything.. I guess it's time to buy a compression guage? not sure what else to check at this point. maybe it's just time to take it to a real mechanic...
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#6
06-19-2012, 05:46 PM
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Replace the fuel lines the ethanol softens them up and the pump sucks and it collapses the line shutting down the fuel flow.
__________________
1987 TriStar 190 Red & White Ski Yesterday, Ski Today, Ski Tomorrow
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#7
06-19-2012, 07:21 PM
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The hoses feel pretty firm, but it can't hurt to replace them... I'll give it a shot.
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#8
06-19-2012, 10:33 PM
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Quote:
__________________
- Peter TIRE & WHEEL SALES email:tiresplease@gmail.com WEEKEND WHEEL SPECIAL Two 14" Aluminum wheels $195 Two 15" Aluminum wheels $215 Four 14" Aluminum wheels $370 Free Freight within lower 48  Steel and galvanized wheels available.
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#9
06-20-2012, 12:55 AM
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Yes, it did backfire once last time I had it out.
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