77 Scarab 300 Prop Selection
08-08-2016, 02:43 PM
#21
08-08-2016, 02:54 PM
#23
i have a pair of 25 mirage plus that i ran on my 30 scarab w/ trs drives
they track straight are balanced, never been welded, have no reconditioning stamps, and are for sale 400 bucks, plus shipping
[ATTACH=CONFIG]558101[/ATTACH][ATTACH=CONFIG]558102[/ATTACH]
they track straight are balanced, never been welded, have no reconditioning stamps, and are for sale 400 bucks, plus shipping
[ATTACH=CONFIG]558101[/ATTACH][ATTACH=CONFIG]558102[/ATTACH]
Last edited by outonsafari; 08-08-2016 at 02:56 PM.
08-08-2016, 03:04 PM
#24
Well that's between 17% and 20% slippage if they are a true 21" pitch. A bit too much for a Mirage prop so there must be a problem. Guessing you already checked carbs are wide open at full throttle and timing is on the money (good tune up). Could be the trannies if your props slightly spin in neutral (clutch packs warped) or just tired motors/heavy boat.
08-08-2016, 03:07 PM
#25
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Well that's between 17% and 20% slippage if they are a true 21" pitch. A bit too much for a Mirage prop so there must be a problem. Guessing you already checked carbs are wide open at full throttle and timing is on the money (good tune up). Could be the trannies if your props slightly spin in neutral (clutch packs warped) or just tired motors/heavy boat.
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I could not imagine propping a boat without having working tachs.
08-08-2016, 03:18 PM
#26
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I wish you woulda posted that about 4 hours ago, I just gave a guy my word Id spend 500 on his props, same as yours. Thanks for the offer though!
08-08-2016, 03:19 PM
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08-08-2016, 03:25 PM
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Ive read several posts on the 30' scarab hull with TRS drives and the consensus was that the 25p was the perfect prop. Props don't spin very much at idle out of the water, trannies seem to be holding up. The three blade 21s that are on there have been labbed, but are in pretty bad shape, looks like the PO used them as a depth finder more than for propulsion. Were gonna try the 25's and see what they do, in the meantime we're gonna send these 21's off the be trued (if that's possible)
