Besides checking the Thermostat -- double-check that your hoses are
correctly routed to the manifolds. Also make sure the manifolds are
not clogged up.
Lee Shuster
801-585-5552
On Aug 11, 2008, at 12:46 PM, JEFF DOOD <jdood@...> wrote:
> i am getting very close to being able to use my boat finally, won't
> go into all the recent past history but it's been a journey. long
> story short, i have a different engine in it now. another buick
> v-6. runs, starts, sounds good, doesn't backfire and lose all power
> at mid throttle, etc. only one problem. when on the hose, it's
> operating at normal temps. when under load, the temp gauge is just
> races right up to the overheat range. thought i might be the gauge,
> no such luck. on 2nd test, same thing. idling at dock it temp
> gauge barely moves. but after about 10 seconds at full throttle it
> starts moving up and within about 30 it's almost pegged. putting on
> a new sending unit next, seeing if that does anything. if it's got
> blockage somewhere, then wouldn't it heat up while on the hose at
> the mechanic's shop also? it's getting water through there. pretty
> sure mechanic replaced impeller at last go around. and there
> doesn't seem to be any obvious leaks or cracks anywhere in the
> manifolds. any ideas?
>
> jeff
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Received on Monday, 11 August 2008
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