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Year

'68 Evinrude 100 HP Starflite

aquasprot I've got some problems with a 68 rude starflite and was hoping someone could help me out:
One night the other week, was running back in from a fishing trip, and the boat sort of lurched forward. The motor sounded fine, ie it didn't miss or rev up, but
2001-11-08
Yepblaze Could be something as simple as a loose plug wire. 2001-11-08
J.B. Cornwell Ahoy, Aquasprot.
Your prop could be ventilating or cavitating. Next time it happens try trimminmg your lower end in a bit.

Red sky at night. . .
JB

2001-11-08
Ted the Rookie Went through the same thing with a 67 100 Starflite. It was the selectric shift solonoids in the lower unit-they weren't cheap, either, as I recall. Your problem sounds identical to the problem I had though... 2001-11-09
aquasprot Thanks all for the help.
I'll try all the suggestions, but think it's going to be something along the lines of what ted mentioned. I have already checked the plug wires, and the prop is brand new.

For the first two I can definitely work on myself,
Ted: how involved was working with the solenoids that you mentioned was the problem? Is it the sort of thing a beginner mechanic could do if he was patient and eager to learn? Also, did yours only act up when hot? Any additional info you could provide would be a help.

Again, thanks to you all.
ed

2001-11-09
iofish I am new at this too, however I would give what JB said serious consideration before you start tearing it apart. I have read a bit about water presure differences around the prop and it is tricky stuff. The temperature detail seems important too. Did this new Prop ever work well? Maybe the prop is slipping when everything warms up and gets more viscous or loose. Sellenoids can stick (warp) when they get hot, but should not pop in and out unless they have an internal wire problem. Basicly a selenoid is a piston like thing that is pulled in with an electro magnetic. Poor quality ones have have plastic as in insulator between the wire coil and piston. The plastic can warp when hot. Like I said I know nothing about boats only technology in general. 2002-05-10

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