Rusty, ChampioNman, Witchdoctor, Seahorse:
If you could please read and give any advice….any/all comments would be appreciated. Sorry for the lengthy post, I’m just trying to give as much as possible on 1st pass.
RIG: ‘94 Evinrude 225HP Looper on ’95 Champion 202 DCX, no jackplate, 28p, 4 blade Renegade, single gas tank, VRO that works fine; (see lak100 post in Champion Boards on 5/31/05)
PERFORMANCE: last year, no gps, ran to 5500-5600 rpms. This year, ran to 60+ GPS, 5200-5300 rpms, some trim left. Ran fine, very good holeshot.
HISTORY: Purchased from original owner last summer, my first boat. Prior owner indicated a problem with idle…he simply choked as workaround to add fuel. This spring a decarb and tuneup, including new drain plugs as recommended by Rusty last summer (BBC post Q/A), my mechanic fixed the idle issue by changing idle/air jets from 30s to 27s. Engine ran great in spring; used boat about 1x per week running a total of 1.5 to 2.0 hours at 4800 – 5400 rpms over several days, plus idle and low rpm time. On one occasion I managed to get grounded on a sandbar off the Chesapeake; got sand up in cooling system, but H2O still was >20 psi at WOT.
BREAKDOWN: About four weeks ago, was running 5-6 miles on the Potomac at 5000+ rpms, came off plane, couldn’t get back over 4,000 rpms. Then shut down and couldn’t get over 2,000 rpms. Managed to get to a launch, engine would start but not go over 2,000 rpms. Then wouldn’t start at all. Took to mechanic (same wrench for all service and repairs), engine always starts (only time wouldn’t start was at Potomac launch) but can’t get to go over 2,000 rpms when trimmed down. Mechanic not located on water, so he tests on muffs, then I take to Delaware River.
REPAIRS/MAINTENANCE - FIX ATTEMPTS:
1. New fuel filter (wasn’t changed earlier, should have been)
2. Cooling system flushed to clean out sand from grounding
3. All carbs cleaned and rebuilt (last week)
4. New powerpack (today 7/2) (no improvement)
5. Note: engine is not overheating; mechanic tested with jump wires S.L.O.W. activated and horn sounded (today, 7/2); this has never happened on the water.
CURRENT STATUS:
1. Compression fine/even over all six
2. In neutral, no load, engine revs fine
3. Full trim DOWN, can NOT get past 2,000 rpms at WOT
4. Full trim UP, can get to 4,200 to 4,400 rpms WOT
5. Idle ok (700-800 rpms in gear), seems like a very slight cough, NOT a backfire
6. When idling, choke causes rpms to decrease
7. When trimmed down and WOT, engine runs at 2,000 rpms sounds like working very hard, but can’t gather enough steam to increase rpms. Only way to increase rpms is to trim up, reducing load.
8. No changes to prop or setup since I have owned.
WHAT ELSE SHOULD BE CONSIDERED?
Let me know if you have any questions on the above.
Thanks for your help on this and to your answers and comments on previous posts.
Larry
lak100
lak100@comcast.net
Modified by lak100 at 1:52 PM 7/7/2005
Modified by lak100 at 1:57 PM 7/7/2005
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. I wish more people would put up an in-depth post like you and TexasHawkeye just have this helps us more than you know. OMC PN on timer base is 584586 and for stator 584643. They will just go bad and cause the exact problem you are describing. H20 Pressure still up in the 15-20 at 4K? If not I'd have him r/r the pump assembly.
CM 
