yahoo

Rich how much did you sell your 2.5's for ? I saw your post of Scream and Fly. Also how much were the 3.0's ? I would love to stop mixing oil.

Curtis

Maximus

Firewalker,

Thank you very much for your response. You seem very knowledgable on this set up. After reading yours and t2x's post we were able to diagnose the problem. The rigging is PERFECT on the boat..the problem is with engine idle speed. They currently idle at 1000-1050 and stall out when adjusted lower. shifting into gear at this level WILL cause damage. The engines are scheduled to be looked at and adjusted by big John of lake x next week.

Thanks for your input.

Maximus

Yahoo...your gonna love thes things... I mght however wait and see what happens with the 4 strokes...That would be the ticket!!! 350hp 4stroke supercharged....Smokin!!

Firewalker

4 Strokes...... Yuuuuuuuuuuuuuuuuuuck!.

I have drag motors that idle at 7-800 rpm, and make 375 hp, set up, set up set up.
The 280 and 300 X are very civil motors, sadly they won't be around much longer, the last production run for the 280 is August, 225 pro max's are done.

Maximus, thanks!, not bad for a desk jockey EH!. ( I broke A LOT of stuff, it will make you learn fast that way......and I also have a rigging shop).

All these motors ( 260/280/300X ) should last a long time, but they are not perfect, and when they go, they go out in style, as T2x can apparently attest. These motors have ultra low quality parts inside them, reality is they should be replaced. Both the 280 and 300X are 150 hour motors ( MAX ), then they need new pistons, rings and bearings. I re-ring at 75 hours, or 8% leakdown. Good oil, and good warm up and cool down also help. ( try AliSyn oil ).

Airpacker

just go i/o and rebuild every 400 hrs instead Rob

dreamboater

I dont think 4 strokes will be the answer, too much weight. Weight savings is what makes the OB's competitive against sterndrive power. Nothing better than to see a twin engine OB cat smoke a single blower motor cat, IMO.

Jonas

ok i have a ? my buddy just did the same change and ordered these props
3 blade 14.5 34 cleaver's labbed
is this a good way to go??????????????

Ryan Beckley

those propps should be what is needed

Maximus

hey Ryan did you get my e-mail?

maximus

frequentflyer

I just blew up a lower unit on my 98 Pro Max 300 (Fleetmaster). The gear case cracked by the carrier, threw the carrier, prop shaft and prop right out. Is this common ? Also I have well over 250 hrs on my motors and haven't had major problems as of yet. They seem to be running strong and compression was ok last time we checked it a few months ago. I realize they are not x's but does the rebuilds every 150 hrs apply to these motors as well ?

Firewalker

250, I would be looking at rebuilding them. Check the leakdown. Compression tells you nothing!.
The 300 Pro Max is a low rpm motor, rpm kills that is why the 300x don't last as long.

RT