1987 Mercury 90-HP Two-stroke-power-cycle Engine Won't Run Under Load, Won't Restart
Posted: Mon Sep 04, 2023 11:34 pm
I have a 1987 Mercury 90-HP two-stroke-power-cycle outboard engine on my recently-purchased 1977 Montauk 17.
As an initial test of the engine, I ran the engine on a hose adaptor on the trailer.
In September 2023 I got the boat on the water on a lake. I went once around the lake at the slowest possible boat speed.
On the second lap around the lake, I increased the engine speed. The bow of the MONTAUK 17 lifted up. The engine shut off. The engine would not re-start.
Later I again tested the engine on the hose adaptor on the trailer. The engine did not shut off when the throttle was increased.
Advice from friends makes me think the cause of the engine shut off and failure to re-start may be due to the carburetors.
I plan to install a new fuel-water separating filter and a new in-line fuel filter.
I have been told that buying replacement carburetors will be less costly than to rebuild the original carburetors.
Q1: where can a Mercury carburetor designation 1090727 be purchased?
Q2: will buying rebuilt carburetors be less expensive than rebuilding the original carburetors?
Give me advice on how to replace the 1987 Mercury 90-HP two-stroke-power-cycle engine's ignition system. The original ignition system is loose and is damaged.
--Chris
As an initial test of the engine, I ran the engine on a hose adaptor on the trailer.
In September 2023 I got the boat on the water on a lake. I went once around the lake at the slowest possible boat speed.
On the second lap around the lake, I increased the engine speed. The bow of the MONTAUK 17 lifted up. The engine shut off. The engine would not re-start.
Later I again tested the engine on the hose adaptor on the trailer. The engine did not shut off when the throttle was increased.
Advice from friends makes me think the cause of the engine shut off and failure to re-start may be due to the carburetors.
I plan to install a new fuel-water separating filter and a new in-line fuel filter.
I have been told that buying replacement carburetors will be less costly than to rebuild the original carburetors.
Q1: where can a Mercury carburetor designation 1090727 be purchased?
Q2: will buying rebuilt carburetors be less expensive than rebuilding the original carburetors?
Give me advice on how to replace the 1987 Mercury 90-HP two-stroke-power-cycle engine's ignition system. The original ignition system is loose and is damaged.
--Chris