Motor sounds like it is speeding up when you give it gas under load , does it sometimes when you are just driving along at speed . Do these large motors have shear pins ?
As far as I know, no shear pins and a shear pin only shears once. It sounds more like a spun prop hub or cavitating prop.
With a marker, draw a line across the prop and hub. Check the line the next the boat revs like you say. If it's not lined up, the hub is spun.
If the line is OK, a cavitating prop is the next thing to look for. If the trim is changed does the revving up change? The motor height may be too high.
Stopped raining so I took the prop off and had I look at the back it does look like it has spun inside prop , l had a submerged water logged 2X6 hit the prop a couple of weeks ago. I stopped and saw the 2x6 pieces checked prop and no damage so carried on , now Saturday I went out with two people and that's when the motor started speeding up under load right about 3300 rpm . So now the question is should I do to repair it . I have crazy glued rubber motor mounts on cars before but they don't have that kind of torque on them so what would you suggest ? it's a newer ballistic stainless steel prop.
Prop shops here don't rehub the older pressed in hubs ,they only do the new hubs that any idiot can do at home . I bought a new prop and will press the old hub out myself and repair for a spare prop.
Prop shops here do not fix pressed in hubs anymore they only fix the new ones that any idiot can fix at home . I bought a new prop and will press out the hub myself and repair it myself .
Pressed in hub for ballistic 345033 prop or erinrude prop is n/a from evinrude and obsolete from Michigan wheel who has phased that prop style out . You can buy a newer style as prop with the new flat sided plastic hub kit but not the round pressed in hub I need , we have two prop shops here and neither one has a hub I can get . The reliable prop shop that all the marine stores use only presses in Volvo penta hubs no other ones anymore.
We are running into that to some extent here in north lower Mich. Seems when he can find a hub it takes forever to arrive. I think he found an aftermarket supplier...
